Force and Pressure 8 Assignment 05

Q1.

Which force enables animals like horses and bullocks to pull carts?

A) Gravitational force

B) Muscular force

C) Electrostatic force

D) Magnetic force

Q2.

A rubber ball is pushed along a table and then stopped by a hand. What force causes the ball to slow down before the hand touches it?

A) Friction

B) Gravity

C) Muscular force

D) Electrostatic force

Q3.

What happens to the speed of an object when a force is applied in the direction of its motion?

A) It decreases

B) It remains unchanged

C) It increases

D) It stops completely

Q4.

A porter places a cloth ring on his head to carry a heavy load. Why does this make it easier?

A) It reduces the force of the load

B) It increases the area, reducing pressure

C) It decreases the weight of the load

D) It increases the friction on his head

Q5.

Which of the following is an example of a contact force?

A) Magnetic force attracting iron

B) Gravity pulling a coin to the ground

C) Kicking a football

D) Electrostatic force between charged straws

Q6.

In Activity 8.4, a ball’s direction changes when it strikes a ruler. What does this show about force?

A) Force can only change speed

B) Force can change direction of motion

C) Force always stops an object

D) Force only affects shape

Q7.

The force exerted by a charged body on another body, even without contact, is called:

A) Muscular force

B) Gravitational force

C) Electrostatic force

D) Friction

Q8.

Water in a bottle with holes at the same depth flows out equally. What does this indicate?

A) Pressure increases with depth

B) Pressure is equal at the same depth

C) Pressure depends on the size of the hole

D) Pressure is only at the bottom

Q9.

What is the state of motion of an object at rest?

A) Zero speed

B) Constant speed

C) Changing direction

D) Increasing speed

Q10.

A balloon sticks to a wall after being rubbed with cloth. Which force is responsible?

A) Gravitational force

B) Muscular force

C) Electrostatic force

D) Atmospheric pressure

Answers:

B) Muscular force
A) Friction
C) It increases
B) It increases the area, reducing pressure
C) Kicking a football
B) Force can change direction of motion
C) Electrostatic force
B) Pressure is equal at the same depth
A) Zero speed
C) Electrostatic force