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Changing Speed

In this worksheet students have to use their understanding of forces to describe their effects on a trip to the park.

'Changing Speed' worksheet

Key stage:  KS 2

Curriculum topic:  Forces

Curriculum subtopic:  Resistance and Friction

Difficulty level:  

down

Worksheet Overview

QUESTION 1 of 10

Lots and lots of times in your life already you have been speeding up and slowing down: going down the stairs, running down the corridor (oops!), arriving at your friend's house on your bike - just everyday events.

 

Speeding up and slowing down involve forces. In this worksheet, you can join Callum and his chums playing in the park and trying to find out how to make themselves move faster and slower. Everything they do or play on involves forces. See if you can use your knowledge and understanding to work out what's happening.

 

Up, up and away!

Callum pushes his foot down harder on the path as he rides his scooter.

 

 

What will his scooter do?

change direction

go faster

go slower

When Greg presses the brakes on his bike he slows down.

 

 

Why does he slow down?

the brake pad pushes on the wheel

the brake pad pulls on the wheel

the brakes stop the pedals moving

Sean wants to go faster on his roller blades.

 

 

What should he do?

go uphill

go downhill

go on the grass

Freya is at the top of the slide. She doesn't want to go down too fast.

 

 

What should she do?

sit on a soft coat

go down backwards

hold on to the sides

Milly loves going high on the swing.

 

 

What can she do to go higher?

sit very still

keep pushing her legs forward

push or pull her legs hard in the direction she wants to go

 

Charlie is pulling his younger brothers and sister along on a cart. His sister Hannah wants to slow down. Which of Charlie's actions would NOT slow Hannah down?

Charlie pulls harder

Charlie stops running

Charlie pulls them over the grass

Lucas is having fun on the roundabout.

 

 

Now he wants to get off and go on the swing.

 

Which of these would NOT slow the roundabout down?

Lucas should hold his hands in the air

Lucas should put his feet on the ground

Lucas should tuck his hands and feet in

  • Question 1

Callum pushes his foot down harder on the path as he rides his scooter.

 

 

What will his scooter do?

CORRECT ANSWER
go faster
EDDIE SAYS
If Callum is pushing down harder with his foot on the path he's trying to make his scooter go faster. He is pushing, with more force, against the ground and this extra effort is transferred to his scooter and makes it speed up.
  • Question 2

When Greg presses the brakes on his bike he slows down.

 

 

Why does he slow down?

CORRECT ANSWER
the brake pad pushes on the wheel
EDDIE SAYS
When Greg pulls on the brakes, the brake pads push on the wheels, squeezing them. The more force he uses on the brakes, the harder the pads push against the wheel which slows his bike down.
  • Question 3

Sean wants to go faster on his roller blades.

 

 

What should he do?

CORRECT ANSWER
go downhill
EDDIE SAYS
If Sean goes on the grass, it's harder to move so he'll slow down. If he goes uphill he's going against gravity and will slow down. But if he goes downhill he's going with gravity and that force will help him to go faster.
  • Question 4

Freya is at the top of the slide. She doesn't want to go down too fast.

 

 

What should she do?

CORRECT ANSWER
hold on to the sides
EDDIE SAYS
If Freya sits on a coat she'll probably go faster as it will make her more slippery! Going down backwards won't make much of a difference, but if she holds to sides of the slide as she goes down, she will be pushing against the slide, slowing herself down. You will learn to call this FRICTION.
  • Question 5

Milly loves going high on the swing.

 

 

What can she do to go higher?

CORRECT ANSWER
push or pull her legs hard in the direction she wants to go
EDDIE SAYS
If Milly pushes forward with her legs as she is whizzing up, and then tucks her legs in and leans forward as she is going back, she will go higher and higher. By using her body's force, moving backwards and forwards, she can make the swing go faster and higher.
  • Question 6

 

Charlie is pulling his younger brothers and sister along on a cart. His sister Hannah wants to slow down. Which of Charlie's actions would NOT slow Hannah down?

CORRECT ANSWER
Charlie pulls harder
EDDIE SAYS
If Charlie pulls harder he's using MORE force. Hannah wants him to use less, so that the cart slows down. So Charlie should NOT pull the cart harder because that will speed them up.
  • Question 7

Lucas is having fun on the roundabout.

 

 

Now he wants to get off and go on the swing.

 

Which of these would NOT slow the roundabout down?

CORRECT ANSWER
Lucas should tuck his hands and feet in
EDDIE SAYS
If Lucas tucks his hands and feet in he will be smaller, so the air can slip past him easily and that will make him speed up. If he puts his feet on the ground, that force against the ground will slow him down. If he holds his arms up, he makes a bigger force against the wind, so he'll slow down.
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