-4. If the mass of the Earth is doubled, how much increase would the weight of the objects on earth be?
A halved
B. doubled
C thrice
D. remains the same
5 Dry leaves fall to the ground. Flying pieces of paper fall back in the grassy area The dust in the air
drops on the floor. What conclusion can you give from these observations?
A Gravity causes the objects to fall on the ground.
B. Gravity pushes the objects up and pulls them down
C. The force of gravity moves the objects to another place
D. The air blows harder to transfer the objects to another place
6. In what way does friction help us in our everyday life?
A climbing
B. swimming
C. waiking
D. all of the above
7 A boy and a girl slides down in the slide at a playground, is an example of what type of friction?
A. dry friction
B. fluid friction
C rolling friction
D. static friction
8. In what way can friction be reduced?
A. using oil
B. using grease
C using a wheel
D. all of the above
9 What does friction can do in a moving object?
A. Friction can slow down or stops an object
B Friction can keep an object from moving
C. Both a and b
D None of the given options
direction of the intended motion of an object
10 Friction is a force that acts in the
A. downward
B opposite
C parallel
D same​