Unit 3 Lesson 7 Do Now Free Fall and Momentum

Front

What is the acceleration of a freely falling object due to gravity?

Back

About 9.8 m/s².

Front

How do you calculate the velocity of a freely falling object after a certain time?

Back

Velocity = acceleration due to gravity × time.

Front

What is the velocity of an object after 6 seconds of free fall?

Back

58.8 m/s.

Front

What is the formula for momentum?

Back

Momentum = mass × velocity.

Front

What is the unit of momentum?

Back

kg·m/s.

Front

What does it mean for momentum to be conserved?

Back

The total momentum before an event is equal to the total momentum after the event.

Front

In free fall, what force acts on the object?

Back

Gravity.

Front

What is the difference between free fall and projectile motion?

Back

Free fall is only influenced by gravity, while projectile motion is influenced by both gravity and initial velocity.

Front

What happens to the speed of a freely falling object each second?

Back

It increases by about 9.8 m/s.

Front

Is it true that momentum is always conserved in a closed system?

Back

True.