Science

1. Which of the following is the desirable effect of friction?

A. Walking on the sidewalk. B. Putting extra effort when walking C. Reducing the serviceable life of the machine D. Exerting a lot of effort to move the block on a rough surface

2. The following are the undesirable effects of friction except?

A. Writing on a paper
B. Putting extra effort when walking
C. Reducing the serviceable life of the machine
D. Exerting a lot of effort to move the block on a rough surface

3. Which of the following statements is NOT TRUE about Force?

A. Force can make objects move fast.
B. Force can change the direction of motion of an object.
C. Force is the pull of attraction towards the center of the earth.
D.Force is a push or pull that starts, stops, or changes the direction of an object.

4. Why is it difficult to climb up the stairs rather than to go down the stairs?

A. because you move upward
B. because you move downward
C. because you go with the gravity
D. because you go against the gravity

5. What happens to objects thrown either up, to the right, or to the left?

A. It floats off.
B. It expands.
C. It disappears.
D. It falls to the ground.​