Classical 1B

Name:__________________________Date:___________________

Directions:  Show all work, circle your answer.  Remember to put the correct units in your answer.

1. A car traveled 500 ft. in 30 seconds.  What is the speed of the car?

2. John is on his way to meet his friend Ted.  Ted lives 30 miles from John.  John takes the AC expressway to Ted’s house.  There is no traffic and for this problem there are no tolls on the expressway.  How fast will John go if it takes him 40 minutes?  Give the answer in ft/s.

3. If the speed of the cheetah is 70 m/s.  The time it took the cheetah to run was 2 minutes.  Find the distance the cheetah ran in 2 minutes. 

4. In order for your car to run a quarter mile in 9 seconds, how fast would your car need to go?  Give me the answers in mph (miles per hour).

5. Jack is trying to make the track and field team in college.  In order to get on the team he needs to run a distance of 100m in 7 seconds.  Jack’s speed was 12 m/s.  Did Jack make the team, and what was his time?

Momentum and Forces

Name:________________________________Date:__________________Period:______

1. A man with a mass of 120 kg is running south along the beach.  He ran a distance of 18m in a time of 0.45 min.  What is this man’s momentum in kg*m/s?

2. A car exerts a force of 900N on the road and the friction force between the road and the car is 275N.  Is this car slowing down, accelerating, or speeding up based on the forces?   (Hint:  Draw a picture)

3. A 70 lb. dog is running west at 19m/s.  What was the dog’s momentum in kg*m/s?  (Remember: to get Kg from lb you multiply by .45.)

4. A Man accidentally fell out of a plane that was 7,000 ft in the sky.  His mass was 212kg and he fell at a rate of 9.8m/s2.  Ignoring wind resistance and friction, what is the man’s force?

5. A woman is cleaning her apartment on the third floor of an apartment building.  She puts items that she doesn’t want on the table in order to get rid of them.  She places a bowling ball on the table and goes on cleaning.  The bowling ball starts to move towards the end of the table.  The table is 1.5m tall and when the bowling ball falls toward the ground, it takes 2s to hit the floor.  If the ball’s mass is 10 lb, then what is the ball’s momentum? (Look above for conversion of lb. to kg.)