3q3q3q

Who is credited with the idea of the law of universal gravitation?

• Nikola Tesla

• Sir Isaac Newton

• Albert Einstein

• Galileo Galilei

What force did Newton call the force between Earth and the falling apple?

• Gravitational force

• Frictional force

• Magnetic force

• Electric force

What happens to the ball when thrown up in the air due to gravity?

• It falls to the ground

• It disappears

• It moves sideways

• It remains floating in the air

What does friction do when you push or pull a wooden crate on the floor?

• It increases the speed

• It reduces the weight

• It opposes the force

• It generates heat

How can friction be increased?

• By making surfaces smooth

• By using lubricants

• By reducing the mass of objects

• By making surfaces rough

What is the ability to do work called?

• Energy

• Force

• Motion

• Power

What form of energy does a car battery possess?

• Mechanical energy

• Light energy

• Chemical energy

• Sound energy

What is the energy associated with the movement of electrical charges?

• Sound energy

• Electrical energy

• Light energy

• Mechanical energy

What is the form of energy that comes from the sun?

• Mechanical energy

• Light energy

• Chemical energy

• Thermal energy

Which simple machine is a force multiplier?

• Pulley

• Inclined Plane

• Wedge

• Lever