Review Game Chapters 7, 8 & 9. Multiple Choice 1 Which of the following statements is correct? a.The...

Review GameReview Game

Chapters 7, 8 & 9Chapters 7, 8 & 9

Multiple Choice 1Multiple Choice 1

Which of the following statements is correct?

a.The farther the force is from the axis of rotation, the more torque is produced.

b.The closer the force is to the axis of rotation, the more torque is produced.

c. The closer the force is to the axis of rotation, the easier it is to rotate the object.

d.The farther the force is from the axis of rotation, the less torque is produced.

AA


Paint is splattered on a canvas. After the paint sticks to the canvas, the total momentum of the paint and canvas

a. is zero. c. is equal and opposite.

b. increases. d. decreases.

AA


The relationship between linear acceleration and angular acceleration is given by:

a. v = d/t c. v = rb. a = r d. d = r

BB


As you get farther from the center of Earth, your weight will ____.

a. decrease c. remain the same

b. increase d. can't tell from information given

AA


Which of the following has the greatest momentum?

a. truck with a mass of 2250 kg moving at a velocity of 25 m/s

b.car with a mass of 1210 kg moving at a velocity of 51 m/s

c. truck with a mass of 6120 kg moving at a velocity of 10 m/s

d.car with a mass of 1540 kg moving at a velocity of 38 m/s

BB


A child with a mass of 23 kg rides a bike with a mass of 5.5 kg at a velocity of 4.5 m/s to the south. Compare the momentum of the child with the momentum of the bike.

a.Both the child and the bike have the same momentum.

b.The bike has a greater momentum than the child.

c. The child has a greater momentum than the bike.

d.Neither the child nor the bike has momentum.

CC


If a force is exerted on an object, which statement is true?

a.A large force always produces a large change in the object’s momentum.

b.A large force produces a large change in the object’s momentum only if the force is applied over a very short time interval.

c. A small force applied over a long time interval can produce a large change in the object’s momentum.

d.A small force produces a large change in the object’s momentum.

CC


A force is applied to stop a moving shopping cart. Increasing the time interval over which the force is applied

a. requires a greater force.

b. has no effect on the force needed.

c. requires a smaller force.

d. requires the same force.

CC


Which of the following situations is an example of a visible change in momentum?

a. A hiker walks through a spider’s web.

b. A car drives over a pebble.

c. A volleyball hits a mosquito in the air.

d. A baseball is hit by a bat.

DD


Which conditions will result in the smallest change in momentum?

a. a large force over a long time period

b. a large force over a short time period

c. a small force over a long time period

d. a small force over a short time period

DD

Question 1Question 1

What is the momentum of a What is the momentum of a 13.0 g bullet moving with a 13.0 g bullet moving with a velocity of 320 m/s to the velocity of 320 m/s to the right?right?

4.16 kg4.16 kgm/s to the rightm/s to the right


A basketball has a diameter A basketball has a diameter of 24.1 cm and mass of 0.60 of 24.1 cm and mass of 0.60 kg. It rolls 18 m down the kg. It rolls 18 m down the court. What is the angular court. What is the angular displacement?displacement?

149 rad149 rad


A bolt is to be tightened with a A bolt is to be tightened with a torque of 7.2 Ntorque of 7.2 Nm. If you m. If you have a wrench that is 0.30 m have a wrench that is 0.30 m long, what is the least amount long, what is the least amount of force you must exert?of force you must exert?

24 N24 N


What is the momentum of a What is the momentum of a 72 kg running with a velocity 72 kg running with a velocity of 6 m/s southwest?of 6 m/s southwest?

432 kg432 kgm/s southwestm/s southwest


What is the speed of a satellite What is the speed of a satellite that is in orbit 260 km above that is in orbit 260 km above Mercury’s surface. Mercury’s surface.

mmMM = 3.30 x 10 = 3.30 x 102323 kg kg

rrMM = 2.44 x 10 = 2.44 x 1066 m m

2855 m/s2855 m/s


A 67 kg ice skater moving to the right A 67 kg ice skater moving to the right with a velocity of 2.27 m/s throws a with a velocity of 2.27 m/s throws a 0.15 kg snowball to the right with a 0.15 kg snowball to the right with a velocity of 20 m/s. What is the velocity of 20 m/s. What is the velocity of the ice skater after velocity of the ice skater after throwing the snowball. Disregard throwing the snowball. Disregard friction.friction.2.23 m/s to the right2.23 m/s to the right


A 0.14 kg baseball moving at A 0.14 kg baseball moving at +22.6 m/s is slowed to a stop +22.6 m/s is slowed to a stop by a catcher who exerts a by a catcher who exerts a constant force of -373 N. How constant force of -373 N. How long does it take this force to long does it take this force to stop the ball?stop the ball?0.00848 s0.00848 s


Two balls have their centers Two balls have their centers 2.0 m apart. What is the 2.0 m apart. What is the gravitational force between gravitational force between them? (them? (mm11=8.1 kg, =8.1 kg, mm22=6.0 kg)=6.0 kg)

8.10e-10 N8.10e-10 N


A tire has a radius of 55 cm A tire has a radius of 55 cm and a velocity of 17 m/s. and a velocity of 17 m/s. What is the angular velocity What is the angular velocity of the tire?of the tire?

30.9 rad/s30.9 rad/s


Compute the gravitational Compute the gravitational force the Sun exerts on force the Sun exerts on Jupiter.Jupiter.

mmJJ = 1.90 x 10 = 1.90 x 102727 kg kg

rrJJ = 7.78 x 10 = 7.78 x 101111 m m 4.17x 104.17x 102323 N N


A football punter accelerates A football punter accelerates a 0.60 kg football from rest a 0.60 kg football from rest to a speed of 6.3 m/s in 0.21 to a speed of 6.3 m/s in 0.21 s, what constant force does s, what constant force does the punter exert on the ball?the punter exert on the ball?

18 N upward18 N upward


A 1.28 kg skateboard is moving at a A 1.28 kg skateboard is moving at a speed of 5.58 m/s when a 0.80 kg speed of 5.58 m/s when a 0.80 kg cat drops from a tree onto the cat drops from a tree onto the skateboard. What is the speed of skateboard. What is the speed of the skateboard-cat combination?the skateboard-cat combination?

3.43 m/s3.43 m/s


What is the torque on a What is the torque on a bolt produced by a 15 N bolt produced by a 15 N force exerted force exerted perpendicular to a perpendicular to a wrench that is 28 cm wrench that is 28 cm long?long?

4.2 N4.2 Nmm


What happens to the gravitational What happens to the gravitational force between two masses when force between two masses when the distance between the masses the distance between the masses is doubled?is doubled?

Force is quarteredForce is quartered


The moon has a period of 27.3 days The moon has a period of 27.3 days and a mean distance of 3.90 x 10and a mean distance of 3.90 x 1055 km from the center of Earth. km from the center of Earth. Using this data predict the mean Using this data predict the mean distance from Earth’s center for an distance from Earth’s center for an artificial satellite that has a period artificial satellite that has a period of 4.80 days?of 4.80 days?1.22 x 101.22 x 1055 km km


Two carts with masses of 4.30 kg Two carts with masses of 4.30 kg and 2.94 kg move toward each and 2.94 kg move toward each other on a frictionless track with other on a frictionless track with speeds of 5.42 m/s and 3.12 m/s speeds of 5.42 m/s and 3.12 m/s respectively. The carts stick respectively. The carts stick together after colliding head-on. together after colliding head-on. Find the final speed.Find the final speed.1.95 m/s1.95 m/s

Review Game Chapters 7, 8 & 9. Multiple Choice 1 Which of the following statements is correct? a.The...

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