Title
Chapter 3 – Translational MotionTop of Form
Question 1
The average speed of a horse that gallops 10 kilometers in 30 minutes is
1. 15 km/h.
2. 30 km/h.
3. 40 km/h.
4. 20 km/h.
Top of Form
Question 2
If a car increases its velocity from zero to 60 m/s in 10 seconds, its acceleration is
1. 3 m/s2.
2. 60 m/s2.
3. 600 m/s2.
4. 6 m/s2Bottom of Form
Top of Form
Question 3
A mosquito flying at 3 m/s that encounters a breeze blowing at 3 m/s in the opposite direction has a speed of
a4 m/s.
b0 m/ms
c. 6 m/s.
3 m/s.Bottom of Form
Top of Form
Question 4
A mosquito flying at 3 m/s that encounters a breeze blowing at 3 m/s in the same direction has a speed of
1. 4 m/s.
2. 0 m/s.
3. 3 m/s.
4. 6 m/s
Top of FormQuestion 5
You cannot exert a force on a wall
5. unless you put your mind to it.
6. if the wall resists.
7. Bottom of Formunless the wall simultaneously exerts the same amount of force on you.
Top of Form
Question 6
When you walk at an average speed of 4 m/s, in 5 s you’ll cover a distance of
8. 15 m.
9. 2 m.
10. 10 m.Bottom of Form
11. 20 m.
Top of Form
Question 7
A car’s speed 3 seconds after accelerating from rest at 2 m/s2is
12. 2 m/s.
13. 4 m/s.
14. 3 m/s.
15. 6 m/s.Bottom of Form
Question 8
Explain the difference between rotational and translational motion.
Question 9
During vertical jump (no running), which are the forces acting on the jumper, and their directions?
What is the net force (include the direction of the net force)?
If the Weigh of the jumper is greater than the force exerted on the feet of the jumper, can be the jump be executed?
Question 10
When the body of a jumper leave the ground,what is the only force acting on the jumper?
Question 11
During running High Jump,the jumper use the Kinetic Energy of the run to pass over the bar.What conversion of energy occur during the jump (KE to ?)?
Question 12
During standing broad jump,to reach the maximum range,the jumper needs a Resultant Force with angle of 45 degrees (respect the ground).Which are the forces on the jumper, that are the origin of that resultant force?
Can the jumper change the direction or magnitude ofhis weigh?
Question 13
During standing broad jump, a jumper with mass 67 kg, exerts a force, with his feet,of 1.8 times his weight at an angle of 70 degrees respect the horizontal. Findthe magnitude and direction of the Resultant force Fr?
Question 14
Read the paper:
https://www.tsijournals.com/articles/survey-and-analysis-for-sport-injuries-of-long-jumpers.pdf
Write with less than 500 words a summary of this articles, including: Common injuries and prevention.
Question 15
Find the air resistance acting on a parachuter that jumps from a plane.The mass of the parachuter is 85kg,the coefficient of shape is 0.88 kg/m^3, and the velocity is 25 m/s. The area facing the direction of the motion is 0.30m^2.
Comparethe magnitudes of the air resistance and the weight of the parachuter. What is the magnitude and direction of the net force?
Top of Form
Top of Form 1.
Question 1
Top of Form
Is the object represented below in stable equilibrium or not? Explain
Bottom of Form
Top of FormQuestion 2Bottom of FormTop of Form
Why the person below is bending his torso and extending his arm, while carrying an uneven load?
Top of Form
Question 3
Complete the sentence with the correct phrase:
A body is in static equilibrium if the vectorial sum of both the forces and the torques acting on the body is ______________________
1.
zero
2.
different of zero
3.
100 N
4. equal to body’s weightBottom of Form
Top of Form
Question 4
Write the equation of equilibrium of the forces along the y-axis for the forces acting on the person below
Top of Form
Question 5
Find the magnitude of the force Fa, apply to the shoulder, needed to topple the person below, if the mass of this person is 115 kg (the pivot point is point A)
Question 6
If a force Fa of 125 N is applied to the shoulder of the person below. What is the minimum mass needed to avoid the force Fa topple the person (pivot point is point A).
Bottom of Form
Top of Form
Question 7
Why spreading the legs, a person increases his stability?
Top of Form
Question 8
Define a lever in Physics.
Top of Form
Question 9
Calculate the force F needed to keep the lever below in balance:
a. What class is this lever?
b. Find its Mechanical Advantage.
Bottom of Form
Top of FormQuestion 10
Calculate the force F needed to keep the lever below in balance:
a. What class is this lever?
b. Find its Mechanical Advantage.
Bottom of Form
Top of Form
Question 11
Calculate the force F needed to keep the lever below in balance:
a. What class is this lever?
b. Find the Mechanical Advantage
Bottom of Form
Top of Form
Question 12
Find the magnitude of the displacement L1:
Bottom of Form
Top of Form
Question 13
Write the equations of translational equilibrium, and rotational equilibrium respect point A, for the model of the arm represented below.
Bottom of Form
Top of Form
Question 14
Write the equations of translational equilibrium, and rotational equilibrium respect point A, for the model of the
hip represented below.
a. What represents the letters W and WL?
Bottom of Form
Top of Form
Question 15
Find the force in the Achilles Tendon, if the weight W of the person is 700 N
Bottom of Form Chapter 3 – Translational MotionTop of Form
Question 1
The average speed of a horse that gallops 10 kilometers in 30 minutes is
1. 15 km/h.
2. 30 km/h.
3. 40 km/h.
4. 20 km/h.
Top of Form
Question 2
If a car increases its velocity from zero to 60 m/s in 10 seconds, its acceleration is
1. 3 m/s2.
2. 60 m/s2.
3. 600 m/s2.
4. 6 m/s2Bottom of Form
Top of Form
Question 3
A mosquito flying at 3 m/s that encounters a breeze blowing at 3 m/s in the opposite direction has a speed of
a4 m/s.
b0 m/ms
c. 6 m/s.
3 m/s.Bottom of Form
Top of Form
Question 4
A mosquito flying at 3 m/s that encounters a breeze blowing at 3 m/s in the same direction has a speed of
1. 4 m/s.
2. 0 m/s.
3. 3 m/s.
4. 6 m/s
Top of FormQuestion 5
You cannot exert a force on a wall
5. unless you put your mind to it.
6. if the wall resists.
7. Bottom of Formunless the wall simultaneously exerts the same amount of force on you.
Top of Form
Question 6
When you walk at an average speed of 4 m/s, in 5 s you’ll cover a distance of
8. 15 m.
9. 2 m.
10. 10 m.Bottom of Form
11. 20 m.
Top of Form
Question 7
A car’s speed 3 seconds after accelerating from rest at 2 m/s2is
12. 2 m/s.
13. 4 m/s.
14. 3 m/s.
15. 6 m/s.Bottom of Form
Question 8
Explain the difference between rotational and translational motion.
Question 9
During vertical jump (no running), which are the forces acting on the jumper, and their directions?
What is the net force (include the direction of the net force)?
If the Weigh of the jumper is greater than the force exerted on the feet of the jumper, can be the jump be executed?
Question 10
When the body of a jumper leave the ground,what is the only force acting on the jumper?
Question 11
During running High Jump,the jumper use the Kinetic Energy of the run to pass over the bar.What conversion of energy occur during the jump (KE to ?)?
Question 12
During standing broad jump,to reach the maximum range,the jumper needs a Resultant Force with angle of 45 degrees (respect the ground).Which are the forces on the jumper, that are the origin of that resultant force?
Can the jumper change the direction or magnitude ofhis weigh?
Question 13
During standing broad jump, a jumper with mass 67 kg, exerts a force, with his feet,of 1.8 times his weight at an angle of 70 degrees respect the horizontal. Findthe magnitude and direction of the Resultant force Fr?
Question 14
Read the paper:
https://www.tsijournals.com/articles/survey-and-analysis-for-sport-injuries-of-long-jumpers.pdf
Write with less than 500 words a summary of this articles, including: Common injuries and prevention.
Question 15
Find the air resistance acting on a parachuter that jumps from a plane.The mass of the parachuter is 85kg,the coefficient of shape is 0.88 kg/m^3, and the velocity is 25 m/s. The area facing the direction of the motion is 0.30m^2.
Comparethe magnitudes of the air resistance and the weight of the parachuter. What is the magnitude and direction of the net force?
Top of Form
Top of Form Chapter 7 Fluids. Chapter 8. Motion of fluids
Question 1
A container consists of two vertical cylindrical columns of different diameter connected by a narrow horizontal section, as shown in the figure. The open faces of the two columns are closed by very light plates that can move up and down without friction. The tube diameter at A is 35.0 cm and at B it is 10.2 cm. This container is filled with oil of density 0.820 g/cm3. If a 125-kg object is placed on the larger plate at A, how much mass should be placed on the smaller plate at B to balance it?
Question 2
As shown in the figure, water (density 1000 kg/m^3) is flowing in a pipeline. At point 1 the water speed is 5.90 m/s.Point 2 is 5.20 m above point 1. The cross-sectional area of the pipe is0.0800 m^2at point 1 and 0.0200 m^2 at point 2. What is the pressure difference P1 – P2 between points 1 and 2? Treat the water as an ideal incompressible fluid.
Question 3
Calculate the pressure exerted on the ground due to the weight ofperson standing on one foot. if the bottom of the person’s foot is13cmwide and 28cm long.
Hint: Pressure = Force/ Area
1. 4.8104Pa
2. 2.1104Pa
3. 2.2103Pa
4. 5.3104Pa
Question 4
A block of metal weighs 40 N in air and 30 N in water. What is the buoyant force on the block due to the water? The density of water is 1000 kg/m3.
Hint: Archimedes’s Principle
1. 10 N
2. 30 N
3. 70 N
4. 40 N
Question 5
A plastic block of dimensions 2.00 cm 3.00 cm 4.00 cm has a mass of 30.0 g. What is its density?
Hint: Density = mass / volume
1. 1.25 g/cm3
2. 1.60 g/cm3
3. 0.80 g/cm3
4. 1.20 g/cm3
Question 6
Under standard conditions, the density of air is 1.29 kg/m3. What is the mass of the air inside a room measuring 4.0 m 3.0 m 2.0 m?
Hint: mass = density x volume
1. 3.1 kg
2. 31 kg
3. 19 kg
4. 0.32 kg
5. 1.9 kg
Question 7
Fluid flows at 2.0 m/s through a pipe of diameter 3.0 cm. What is the volume flow rate of the fluid?
Hint: Volume flow rate = velocity x area
1. 5.7 10-3m3/s
2. 57 m3/s
3. 14 m3/s
4. 1.4 10-3m3/s
Question 8
A fluid is flowing with an average speed of 1.5 m/s through a tube that has a radius of 2.0 mm and is 18 cm long. The drop in pressure is 967 Pa. What is the viscosity of the fluid?
Hint: Use Poiseuille’s Equations
1. 0.028 N s/m2
2. 0.0034 N s/m2
3. 0.0056 N s/m2
4. 0.013 N s/m2
5. 0.0018 N s/m2
Question 9
Water flows through a pipe. The diameter of the pipe at point B is larger than at point A. Where is the water pressure greatest?
Hint: Remember that: P + g(density)h + 0.5(density)v^2 = constant
1. at point A
2. at point B
3. It is the same at both A and B.
