Newton's First Law | Science | Quizalize & Oak National Academy

Starter quiz

What can make an object speed up, slow down, change direction or change shape?
- 'force' ✓
What is the name of the force which is produced when two solid surfaces rub against each other?
- upthrust
- drag
- friction ✓
- thrust
- tension
What is the name of the force that opposes movement when a solid object passes through a liquid or gas?
- upthrust
- drag ✓
- friction
- thrust
- tension
A firework has a weight of 0.2 N and it produces an upwards thrust of 1.0 N when launched. What it the resultant force on the firework?
- 0.2 N upwards
- 1.0 N downwards
- 1.2 N upwards
- 0.8 N downwards
- 0.8 N upwards ✓
Someone pushes a trolley along a flat road until it is moving quickly. They then jump on for a ride, putting both their feet up. Which of these statements is correct after they are on the trolley?
- The force of friction will push the trolley forwards.
- A push force is still driving the trolley forwards.
- There is no force pushing the trolley forwards. ✓
- Fiction and drag will cause the trolley to immediately stop.
- Friction and drag will cause the trolley to gradually slow down. ✓
A child lets go of a bundle of ten large helium balloons, each has a weight of 0.5 N. Each balloon produces an upthrust of 1 N. What is resultant force on the bundle of balloons?
- 0.5 N upwards
- 1.5 N upwards
- 5.0 N downwards
- 5.0 N upwards ✓
- 0 N

Exit quiz

Match the key word to the definition.
- stationary
  
  ⇔
  
  not moving ✓
- friction
  
  ⇔
  
  force between two surfaces in contact when one tries to move ✓
- resultant force
  
  ⇔
  
  the sum of the forces on an object accounting for direction ✓
- gravitational
  
  ⇔
  
  a force that pulls objects towards Earth ✓
- acceleration
  
  ⇔
  
  a change in speed or direction of movement ✓
Which of these is an example of an object that has no propelling (forwards acting) force?
- A car speeding up as it travels along a road.
- A rocket taking off from a launchpad.
- A shopping trolley being pushed by a customer.
- A marble rolling along a flat desk. ✓
- A sled being dragged by some dogs.
Which of these are true when there is no resultant force acting on an object?
- It cannot be moving.
- It must be moving.
- If it is stationary it will remain stationary. ✓
- If it is moving it will stay moving at the same speed in the same direction. ✓
- If it is moving it must change speed or direction.
The figure shows two forces acting on a lorry. What is the resultant force on the lorry?
- 0 N
- 400 N backwards
- 400 N forwards ✓
- 1600 N backwards
- 1600 N forwards
The figure shows two forces acting on a moving lorry. What will happen to the lorry?
- It will stop moving immediately.
- It will speed up.
- It will slow down. ✓
- It will start moving backwards.
- It will stay at the same speed.
A bowling ball is launched from a ramp along a bowling alley as shown in the figure. Which of the following statements are true?
- The ball is at its highest speed at point B. ✓
- There is no force acting forwards between B and C ✓
- There is no resultant force on the ball between B and C.
- The ball speeds up between points B and C.
- A frictional force acts on the ball between points B and C. ✓

Worksheet

Loading worksheet ...

Presentation

Loading presentation ...

Video

Lesson Details

Key learning points

Resultant forces make the movement of things change.
Friction acts against the direction of movement of an object.
An object will continue to move at a steady speed in a straight line unless a resultant force is acting.

Common misconception

Pupils believe driving forces are needed to keep objects moving at constant speed.

Demonstrate that friction (and drag) bring objects to a stop, showing that different surfaces produce the forces that slow objects.

Keywords

Stationary - A stationary object is not moving.
Resultant force - A resultant forces the sum of all forces acting on an object.
Frictional force - Frictional forces act between surfaces, to oppose the movement of an object.
Gravitational force - The gravitational force on an object pulls it downwards, towards Earth.