Gravity Review

If F/M = A then what is force proportional to?

• acceleration

• mass

• force

• Kinetic Energy

If a force is applied perpendicular to an object's movement we will see

• Velocity

• A change in direction

• Acceleration

• Slowing Down

Ignoring air resistance; how do you know all objects fall at the same speed?

• the force of gravity is the same on everything

• force is proportional to mass so acceleration is the same

• more mass means more force means less acceleration

• more mass means less force means more acceleration

What is the acceleration due to gravity?

• 10 m/s/s

• 9.8 m/s/s

• 25kg

• 150 m/s

Gravitational force is bigger for a 100kg or 10kg skydiver

• 100kg

• 10kg

• neither

• both

What is the unit for energy?

• KE

• Joules

• Newtons

• kilograms

An object with kinetic energy must be

• pulled down by gravity

• getting hotter

• moving

• having energy stored in it's chemical bonds

An object has gravitational potential energy because

• how fast it's going

• how hot it is

• the distance off the ground

• stored energy in the bonds of a chemical

As an object falls to the ground the Potential energy is transferred into... (ignoring air resistance)

• Thermal Energy

• Chemical Potential Energy

• Kinetic Energy

• Gravitational Potential Energy

When a perpendicular force is applied to an object in motion it will....

• Speed up

• change direction

• Slow Down

• Explode