G1 Forces Quiz

Friction can be useful, but it can be a problem too! Which of the following shows a good use of friction?

• Braking of car during an emergency

• Use large amount of energy to move an object

• Giving off heat when dragging an object on the floor

• Wear and tear on the soles of your shoes

This diagram shows two different pulley systems.

Which of the following is correct? (more than 1 correct answer!)

• V is a fixed pulley system

• W is a fixed pulley system

• V is a moveable pulley system

• W is a moveable pulley system

A man uses a crowbar as a lever to pick up a heavy box. Which row describes X?

• effort

• fulcrum

• load

The diagram shows a balloon getting squeezed. Which effect of a force is shown?

• changing the shape and size of an object

• changing the speed of an object

• changing the mass of an object

• changing the direction of a moving object

Which answer has the correct instrument for measuring force and its unit?

• spring balance, gram

• spring balance, Newton

• electronic balance, gram

• electronic balance, Newton

Two magnets are brought close together as shown. What is the effect of the two magnets and the type of force present?

• attraction ; magnetic force

• repulsion ; magnetic force

• attraction ; elastic force

• repulsion ; elastic force

A ramp is used to load heavy boxes into a truck. Which of the following about the usage of the ramp is correct as compared to carrying the load vertically up?

• increases the force required

• increase the height the load is raised

• reduce the force required

• reduce the height the load is raised

Friction can cause wear and tear to moving surfaces. Which of the following is not a method to reduce friction?

• use of lubricants

• use of inclined plane

• use of wheels

• use of ball bearings

Which of the following is correct about a fixed pulley and movable pulley?

• Fixed pulley requires lesser effort than the load.

• Movable pulley requires same amount effort as the load.

• The load in fixed pulley moves in the direction of the effort.

• The load in movable pulley moves in the direction of the effort.

Which action is not an example of gravitational force?

• Apple falling from a tree to the ground.

• Ball rolling down a slope.

• Squeezing a piece of sponge.

• Water flowing from a waterfall.