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Physics Chapter 7 Question and answers already passed

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Physics Chapter 7 Question and answers already passed Physics Chapter 7 The momentum of an object is defined as the object's: a. mass times its velocity b. force times the time interval c. force times its acceleration d. mass times its acceleration - correct answer a. mass times its ve...

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  • October 19, 2024
  • 8
  • 2024/2025
  • Exam (elaborations)
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Physics Chapter 7
The momentum of an object is defined as the object's:
a. mass times its velocity
b. force times the time interval
c. force times its acceleration
d. mass times its acceleration - correct answer ✔a. mass times its velocity


Which has more momentum, a large truck moving at 30 miles per hour or a
small truck moving at 30 miles per hour?
a. both have the same momentum
b. the small truck
c. the large truck - correct answer ✔c. the large truck


The momentum change of an object is equal to the:
a. impulse acting on it
b. velocity change of the object
c. force acting on it
d. force acting on it times its velocity - correct answer ✔a. impulse acting on
it


a table tennis ball launcher is fired. Compared to the force on the ball, the
force on the launcher is:
a. larger
b. the same
c. smaller - correct answer ✔b. the same

, A freight train rolls along a track with considerable momentum. If it were to roll
at the same speed but had half as much mass, its momentum would be:
a. zero
b. unchacnged
c. halved
d. doubled - correct answer ✔c. halved


Momentum and velocity share a/an:
a. directly proportional relationship
b. inversely proportional relationship
c. conversely proportional relationship
d. unable to be determined relationship due to lack of information - correct
answer ✔a. directly proportional relationship


When would a small car have more momentum than large truck?
a. when athey are both traveling the same speed
b. when the truck is at rest and the car is in motion
c. it never would as the truck is so much more massive than the car - correct
answer ✔b. when the truck is at rest and the car is in motion


A 5-kg ball is thrown at 4 m/s. What is the ball's momentum?
a. 0.8 kg×m/s
b. 1.25 kg×m/s
c. 9 kg×m/s
d. 20 kg×m/s - correct answer ✔d. 20 kg×m/s


A 10.0-kg ball has a momentum of 5.0 kg×m/s. What is the ball's speed?

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