1. Which statement does NOT describe force?
a. a push or pull that produces a change in the state of motion of an object
b. it does NOT always move an object
c. can produce a change in motion
d. it is the distance and time that an object has traveled
2. The following describes a Net force EXCEPT:
a. it may cause an object at rest to start moving
b. it may cause a change of energy associated with distance and time
c. may cause a moving object to stop
d. may cause a change in direction of a moving object
3. Which forces are equal in magnitude but act in opposite directions?
c. Contact forces
d. Balance forces
b. Field forces
a. Net forces
4.After a cannon ball has been fired into a frictionless space, how much force is needed to keep it going?
a. zero, since no force is necessary to keep it going
b. one-half of the force with which was fired
c twice the force with which it was fired
d. the same amount of force with which it was fired
5. If a horse pulls on a calesa at rest, the calesa pulls back equally as much on the horse. Will the calesa be set into motion?
a. No, because the forces cancel each other
b. Yes, because there is a net force acting on the calesa
c. Yes, because there is a time delay between action and reaction
d. Yes, because the horse's pull on the calesa is larger than the calesa's pull o the horse
6. Which of the following statements about contact forces is TRUE?
a. There is more friction when soft surfaces touch
b. Contact forces require two or more surfaces to touch one another
c. Gravity and Electromagnetic force are types of contact force
d. None of the above
7. Which of the following statements about noncontact forces is FALSE?
a. Noncontact forces are fundamental forces in nature
b. Noncontact forces cannot be found in nature
c. One of the gravitational forces on Earth is Earth's pull toward its core
d. Electromagnetic force is the force of attraction between protons and electrons
8. The unit of force, a Newton, is equal to
a. The amount of mass in an object
b. Mass x Velocity
c.kgom/s²
d. kgom/atta mark on
9. The tendency of an object to resist change in its motion is known as
a. Mass
c. Force
d. Balance
b. Inertia
10. The greater the mass of an object,
a. the easier the object starts moving
b. the greater its inertia.
c. the more balanced it is
d. the more space it takes up
11. According to Newton's third law of motion, when a hammer strikes and exerts force on a nail, the nail also
a. creates a with the hammer
b. disappears into the wood
c.exert an equal force back on the hammer
d. moves at a constant speed
12. If three balls of different materials were dropped at the same time from the same height, whic the ground first? (Assume there is no air resistance.)
a tennis ball
B. solid rubber ball
c. a solid steel ball
d. They would all hit at the same time.
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Answer:
1. b 2. c 3. a 4. d 5. a 6. c 7. a 8. b 9. a 10. c 11. c 12. d
Explanation:
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