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Science: Middle School: Grades 6, 7 and 8 Quiz - Forces 2 (Questions)

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You've learned about all the different forces which act on objects. Friction (which slows things down), gravity (which pulls things towards the Earth or other large body), magnetism (which attracts certain metals and repels opposite magnetic poles), air resistance and water resistance (which both drag on moving objects) - these are all different types of pushes and pulls. Now see if you can recognize which forces are in action in different situations.

Can you spot the forces at work? Is it magnetism or gravity, or could it be upthrust? Challenge yourself with this science quiz about forces.

What type of force is water resistance?

[ ]	Gravity
[ ]	Upthrust
[ ]	Friction
[ ]	Water resistance is not a force

What type of force is air resistance?

[ ]	A pull
[ ]	Friction
[ ]	Gravity
[ ]	Magnetism

A toy plastic boat floating in a bucket of water is experiencing which forces?

[ ]	Gravity and upthrust
[ ]	Magnetism and gravity
[ ]	Magnetism and upthrust
[ ]	Water resistance and magnetism

A row boat being rowed across a lake is experiencing which forces?

[ ]	Gravity and upthrust
[ ]	Gravity and water resistance
[ ]	Gravity, upthrust and water resistance
[ ]	Gravity, upthrust, water resistance, air resistance and a push

Imagine someone cycling up a steep hill. Which forces are being experienced by the cyclist's shoes?

[ ]	Gravity, magnetism and a push
[ ]	Gravity, air resistance, a push, a pull and friction
[ ]	Air resistance, a push and magnetism
[ ]	Gravity and water resistance

Which forces do the tires on a moving bicycle experience?

[ ]	Gravity and a push
[ ]	Gravity, upthrust, air resistance and magnetism
[ ]	Gravity, water resistance and friction
[ ]	Gravity, friction, upthrust, air resistance and a push

What forces are acting on a parachute as it falls through the air?

[ ]	Upthrust and air resistance
[ ]	Friction and magnetism
[ ]	Gravity and air resistance
[ ]	Magnetism and water resistance

Which forces are acting on a child who is going down a slide?

[ ]	Gravity, air resistance and friction
[ ]	Gravity, air resistance and water resistance
[ ]	Gravity, magnetism and friction
[ ]	Gravity only

A child at the top of a slide is experiencing balanced forces. What force is needed to start the child sliding?

[ ]	Upthrust
[ ]	A push
[ ]	Gravity alone
[ ]	Friction

10.

Catapults are designed to provide a 'push' which will be stronger than the force of gravity - the object which is being catapulted should be aerodynamic to minimize which force?

[ ]	Air resistance
[ ]	Upthrust
[ ]	Magnetism
[ ]	All of the above

Science: Middle School: Grades 6, 7 and 8 Quiz - Forces 2 (Answers)

What type of force is water resistance?

[ ]	Gravity
[ ]	Upthrust
[x]	Friction
[ ]	Water resistance is not a force

Water resistance slows things down, just like air resistance

What type of force is air resistance?

[ ]	A pull
[x]	Friction
[ ]	Gravity
[ ]	Magnetism

Air resistance and water resistance are both types of friction - air resistance is the friction an object experiences when moving through air and water resistance is the friction an object experiences when moving through water

A toy plastic boat floating in a bucket of water is experiencing which forces?

[x]	Gravity and upthrust
[ ]	Magnetism and gravity
[ ]	Magnetism and upthrust
[ ]	Water resistance and magnetism

Upthrust is the force that prevents the boat from sinking. All objects on Earth experience gravity all of the time

A row boat being rowed across a lake is experiencing which forces?

[ ]	Gravity and upthrust
[ ]	Gravity and water resistance
[ ]	Gravity, upthrust and water resistance
[x]	Gravity, upthrust, water resistance, air resistance and a push

The push comes from the rowing of the oars pushing the boat forwards through the water

Imagine someone cycling up a steep hill. Which forces are being experienced by the cyclist's shoes?

[ ]	Gravity, magnetism and a push
[x]	Gravity, air resistance, a push, a pull and friction
[ ]	Air resistance, a push and magnetism
[ ]	Gravity and water resistance

Gravity is always being exerted on objects, air resistance results from moving through the air, and friction results from the shoe's 'grip' on the pedals. The cyclist pushes down on the pedals (through the shoes) and pulls up after each push

Which forces do the tires on a moving bicycle experience?

[ ]	Gravity and a push
[ ]	Gravity, upthrust, air resistance and magnetism
[ ]	Gravity, water resistance and friction
[x]	Gravity, friction, upthrust, air resistance and a push

Although it can be hard to imagine, the road is exerting upthrust on the bike's tires - this is the force that prevents the bike from sinking through the road!

What forces are acting on a parachute as it falls through the air?

[ ]	Upthrust and air resistance
[ ]	Friction and magnetism
[x]	Gravity and air resistance
[ ]	Magnetism and water resistance

Gravity pulls the parachute down and air resistance slows its fall

Which forces are acting on a child who is going down a slide?

[x]	Gravity, air resistance and friction
[ ]	Gravity, air resistance and water resistance
[ ]	Gravity, magnetism and friction
[ ]	Gravity only

Gravity pulls the child downwards, friction from the slide and air resistance both slow the child down

A child at the top of a slide is experiencing balanced forces. What force is needed to start the child sliding?

[ ]	Upthrust
[x]	A push
[ ]	Gravity alone
[ ]	Friction

At the top of the slide gravity is countered by upthrust

10.

Catapults are designed to provide a 'push' which will be stronger than the force of gravity - the object which is being catapulted should be aerodynamic to minimize which force?

[x]	Air resistance
[ ]	Upthrust
[ ]	Magnetism
[ ]	All of the above

Aerodynamic objects have less friction with the air and so are slowed less by air resistance