Upper Primary Science-Forces

What is forces ?

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When we apply a force in a direction towards our body, it is a _______?

• PULL

• PUSH

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When we apply a force in a direction away from our body, it is a ______

• PUSH

• PULL

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Which of the following objects have forces acting on them ?

• An apple that is on a tree.

• A book that is placed on the floor.

• A rocket that is in space.

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What are the effects of a force ?

• Start or stop the motion

• Change the size or shape

• Increase or decrease the speed of a moving object

• Change the direction of motion of a moving object

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A Ball of plasticine is released from a heigh of eight metres.

Which of the following is likely to occur when the ball of plasticine lands on the ground?

• Its shape changes

• Its weight changes

• Its position changes

Which of the following is likely the reason why a racing car is able to move forward quickly?

• A small gravitational force acts on the racing car.

• The racing car has a small mass.

• The streamlined shape of the racing car reduces the frictional force between air and the racing car.

• The racing car is able to increase the frictional force between its wheels and ground

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Which forces exist between objects in contact ?

• Frictional Forces

• Elastic Spring Force

• Magnetic Forces

• Gravitational force

Which of the following is not a force?

• Kinetic force

• Gravitational force

• Elastic spring force

• Magnetic Force

What is friction ?

• A force

• A energy

• A surface

• Heat