Free-Fall Review 1

Front

What is the value of g in free fall?

Back

g = -9.8 m/s², which is the acceleration due to gravity on Earth.

Front

If an object takes 10 seconds to rise, what is the total time in the air?

Back

20 seconds, because the time taken to rise is equal to the time taken to fall.

Front

What happens to the speed of a ball thrown upwards when it is caught coming down?

Back

The speed of the ball when caught is the same as the speed it had when thrown upwards.

Front

In a vacuum, which will hit the ground first if dropped from the same height: a feather or a metal bolt?

Back

They would hit the ground at the same time.

Front

How fast is an object going 6.0 seconds after being tossed downward at -10 m/s?

Back

-70 m/s.

Front

What is free fall?

Back

Free fall is the motion of an object under the influence of gravitational force only.

Front

What is the difference between weight and mass?

Back

Weight is the force exerted by gravity on an object, while mass is the amount of matter in an object.

Front

What is the formula for calculating weight?

Back

Weight (W) = mass (m) × acceleration due to gravity (g).

Front

What is terminal velocity?

Back

Terminal velocity is the constant speed an object reaches when the force of gravity is balanced by the drag force of the medium through which it is falling.

Front

What is the significance of air resistance in free fall?

Back

Air resistance opposes the motion of falling objects, affecting their acceleration and terminal velocity.