Edexcel IGCSE Physics 1.16 Friction

Practise recognising friction as an opposing force, then linking its direction to changes in velocity for moving objects.

Exam points

draw a friction arrow opposite to the motion of a puck, van or similar object
explain that friction causes deceleration because the force acts opposite to velocity

[Maximum number: 3]

Ice hockey is a team sport played on ice. Players try to hit a disc called a puck into the other team's goal.

(a)

Diagram 2 shows a puck travelling across some rough ice.

Diagram 2

The rough ice exerts a frictional force on the puck.

[ 3 ]

(i)

Draw a labelled arrow on diagram 2 to show the force of friction acting on the puck.

[ 1 ]

(ii)

Explain how the force of friction changes the velocity of the puck.

[ 2 ]

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