Question

are true (T) or false (F). Correct the false statements.
4. Less force will be required to move a heavier body than a lighter one.
on a body increases the mass of the body.
2. Force can change the direction of motion.
3. If the applied force is not enough, the object may not move.
(b) Changes the direction of motion
(d) All of them
(d) newton
5. Friction causes wear and tear of the surfaces in contact.
6. Only solid surfaces experience friction
Choose the correct option.
1. Which of the following is an effect of force?
(a) Starts motion
(c) Stops motion
2. Which of the following is not a unit of force?
(a) gram-force
(b) dyne
(c) joule
3. Kneading dough shows which effect of force?
(a) change in speed
(c) change in shape and size
4. Which of the following is not an effect of friction?
(a) To produce heat
(c) To cause wear and tear of the surfaces
5. Which of the following is not a type of friction?
(a) Rolling friction
(b) Static friction
6. Friction can be reduced by
(a) using ball bearings (b) polishing
(b) change in direction
(d) change in mass
(b) To increase the speed of the body
(d) To oppose the motion of the body
(c) Slowing friction
(d) Sliding friction
(c) streamlining
(d) all of them
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Answer 1

Answer:

1. false, more force

2. true

3. true

5. true

6. false

2. 1. both

2.c. joule

3. c change in shape and size

Answer 2

Answer:

only solid surfaces experience friction