Y7 Forces

Which of the following never changes no matter where we are in the universe?

• weight

• force

• mass

• pounds

The force of gravity acting on an object is the object's ______.

• mass
• matter
• weight 
• friction 

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What's the unit of weight?

• pounds

• grams (g)

• newtons (N)

• kilograms (kg)

Which ones are examples of forces?

• gravity

• twist

• buoyancy

• friction

• thrust

To drag a sofa over carpet, movers sometimes use slippery pads. Which force is reduced with the use of the pads?

• Friction

• Gravity

• Push

• Magnetism

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NGSS.3-PS2-1

If all four forces are balanced, the plane will

• plummet to the ground
• fly faster and faster
• fly slower and slower
• fly at a constant speed and direction

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Which has the least friction?

• snowboard on a snowy hill
• running on the playground
• sandpaper on wood
• a racer on a track

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NGSS.3-PS2-1

Why do air planes and race cars have sleek shapes?

• to reduce friction from air resistance

• to increase air resistance

• to look more appealing

• to scare off birds

What force does a parachute use to slow things down before hitting the ground?

• Friction
• Air resistance
• Water resistance
• Wind

If an object is still when balanced forces act on it, the object will

• move at a constant speed

• stay stationary

• move at a slower speed

• move at a faster speed