EASY
AS and A Level
IMPORTANT
Earn 100

The person in Figure is pulling a large box using a rope. Use the idea of components of a force to explain why they are more likely to get the box to move if the rope is horizontal (as in a) than if it is sloping upwards (as in b ).

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Why is it easier to move the box with the rope horizontal?

Important Questions on Forces: Vectors and Moments

EASY
AS and A Level
IMPORTANT

A crate is sliding down a slope. The weight of the crate is 500 N. The slope makes an angle of 30° With the horizontal. Draw a diagram to show the situation. Include arrows to represent the weight of the crate and the contact force of the slope acting on the crate.

MEDIUM
AS and A Level
IMPORTANT

A crate is sliding down a slope. The weight of the crate is 500 N. The slope makes an angle of 30° With the horizontal. Calculate the component of the weight down the slope.

EASY
AS and A Level
IMPORTANT

A crate is sliding down a slope. The weight of the crate is 500 N. The slope makes an angle of 30° with the horizontal. Explain why the contact force of the slope has no component down the slope.

EASY
AS and A Level
IMPORTANT

A crate is sliding down a slope. The weight of the crate is 500 N. The slope makes an angle of 30° with the horizontal. What third force might act to oppose the motion? In which direction would it act.

MEDIUM
AS and A Level
IMPORTANT

A child of mass 40 kg is on a water slide. The slide slopes down at 25° to the horizontal. The acceleration of free fall is 9.81 ms-2. Calculate the child's acceleration down the slope: when there is no friction and the only force acting on the child is his weight

EASY
AS and A Level
IMPORTANT

A child of mass 40 kg is on a water slide. The slide slopes down at 25° to the horizontal. The acceleration of free fall is 9.81 ms-2. Calculate the child's acceleration down the slope: If a frictional force of 80 N acts up the slope.

EASY
AS and A Level
IMPORTANT

A wheelbarrow is loaded as shown in Figure.

Calculate the force that the person needs to exert to hold the wheelbarrow's legs off the ground.

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EASY
AS and A Level
IMPORTANT

A wheelbarrow is loaded as shown in Figure.

Calculate the force exerted by the ground on the legs of the wheelbarrow (taken both together) when the gardener is not holding the handles.

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