Forces 2
Gravity, air resistance and friction are the forces acting on a child going down a slide.

Forces 2

This Science quiz is called 'Forces 2' and it has been written by teachers to help you if you are studying the subject at middle school. Playing educational quizzes is a fabulous way to learn if you are in the 6th, 7th or 8th grade - aged 11 to 14.

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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.

1.
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
Upthrust is the force that prevents the boat from sinking. All objects on Earth experience gravity all of the time
2.
What type of force is air resistance?
A pull
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
3.
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
Gravity pulls the child downwards, friction from the slide and air resistance both slow the child down
4.
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
At the top of the slide gravity is countered by upthrust
5.
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
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
6.
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
Aerodynamic objects have less friction with the air and so are slowed less by air resistance
7.
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
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!
8.
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
Gravity pulls the parachute down and air resistance slows its fall
9.
What type of force is water resistance?
Gravity
Upthrust
Friction
Water resistance is not a force
Water resistance slows things down, just like air resistance
10.
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
The push comes from the rowing of the oars pushing the boat forwards through the water
Author:  Sheri Smith

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