Physics

Which is a contact force?

• frictional force

• gravitational force

• electrical force

• magnetic force

Which relationship did Isaac Newton not formulate?

• How the force applied to a spring determines how far it stretches.

• How the mass of an object affects its inertia.

• Hw acceleration depends on mass and force.

• How every action has an equal and opposite reaction.

A horse runs at 30 km/ h for 90 minutes. How far does it travel?

• 90 km

• 27 km

• 30 km

• 45 km

A car travels 10 kilometers in two minutes. How fast is it moving?

• 10 km/ h

• 100 km/ h

• 60 km/ h

• 20 km/ h

What causes a bicycle to slow down on flat ground when you stop pedaling?

• Inertia

• gravity

• friction

• tension

When you throw a ball up, what force causes it to fall back down?

• inertia

• gravity

• friction

• tension

A spring has a constant of 5 N/m. Ho far will it stretch when a force of 2N is applied? (F= ke)

A car is travelling at 80 km/ h. How far will it travel after 30 minutes? (S= d/t)

A boy is running at 5 m/s. How long will it take to travel 100 m? (S= d/ t)

A 1kg soccer ball is kicked and accelarates at 20 m/s 2. What force was applied to it?