Effects of forces and measurement of forces

Which of the following is NOT an effect of a force?

(SPE/2014/Q11)

• Changes the direction of a moving object.

• Changes the mass of an object.

• Changes the shape of the object.

• Changes the speed of the object.

One of the effects of forces is changing the direction of a moving object. Study the list below:

Which items in the list are also the effects of forces on an object? (SPE/2016/Q18)

• I, II, III and IV

• I, II and III only

• I, II and IV only

• I and II only

A ball is rolling towards the right. A force is applied on the ball in the opposite direction as shown in figure below. Which of the following effects could happen to the ball? (SPE/2017/Q20)

• (i), (ii)

• (ii), (iii)

• (i), (ii), (iii)

• (ii), (iii), (iv)

Which property of the ball remains unchanged when a boy kicks a ball? (SPE/2014/Q15)

• Mass of the ball.

• Shape of the ball.

• Size of the ball.

• Speed of the ball.

Which of the following effects cannot be observed when you kick a moving ball?

• The ball gets bigger.

• The ball moves faster.

• The ball changes its direction.

• The ball moves faster in a different direction.

Which of the following statements is correct?

• Forces can slow down time.

• Force is neither a push nor a pull.

• Forces can change the mass of an object.

• Forces can change the direction of an object.

Which of the following is measured in newtons (N)?

• Size

• Mass

• Energy

• Friction

A student puts a block of wood on a table as shown on figure below. She wants to measure the force needed to move the block to the left.

Which one of the following instruments should be used?

(SPE/2018/Q19)

• A

• B

• C

• D

Figure below shows two identical blocks of wood, P and Q. Two sets of forces are applied to move the blocks of wood.

In which direction will P and Q move? (SPE/2012/Q12)

• Both P and Q will move to the right.

• P will move to the right while Q will move to the left.

• P will move to the right while Q will not move.

• P will not move while Q will move to the right.

A student stands with both feet on a weighing scale in order to measure his weight. The reading on the scale is 500N. He lifts one foot off the scale and keeps it lifted.

What is the new reading on the scale? (SPE/2020/Q15)

• 0 N

• 250 N

• 500 N

• 1000 N