STM Y8 Forces

What causes an object to fall faster?

• Smaller surface area

• Larger surface area

• If it has a parachute

• If it is softer

What is water resistance ?

• friction between moving object in water

• gravity in water

• pulling force

• friction between moving object in air

What force causes a pen to fall to the floor when dropped?

• magnetism
• gravity
• friction
• motion

What force causes a car to stop when the brakes are applied?

• motion
• gravity
• friction
• magnetism

If two kids are pushing on a desk, but it doesn't move, the forces acting on the desk must be --

• balanced
• unbalanced
• weak
• strong

If a car slows down as it drives up a hill, the forces acting on it must be --

• balanced
• unbalanced
• strong
• weak

Who wins the tug of war with what net force?

• The person on the left with 20 N
• The person on the left with 80 N
• The people on the right with 20 N
• The people on the right with 100 N

Which force is slowing the drag car down?

• gravity

• pull

• air resistance

• push

If both forces have the same strength, it is called a _______ _______.

• unbalanced force

• friction

• balanced force

• gravity

When you are planning a scientific investigation, which variable is the one you keep the same?

• Control variable

• Dependent variable

• Independent variable