Force and Motion

80 N

A .5 kg baseball is hit by a bat. The ball accelerates 160 m/s/s. What force was applied to the ball by the bat?

20 N

A book resting on a table exerts a force of 20 N on the table. What force does the table exert back on the book?

2 m/s

A car moves 200 meters in 100 seconds. What is the speed of the car?

-1.5 m/s/s

A car traveling at 15 m/s starts to decelerate steadily. It comes to a complete stop in 10 seconds. What is it's acceleration?

104 N

A cat has a mass of 4 kg. The force of gravity on Jupiter is approximate 2.6 times greater than the force of gravity on the earth. What would be the cat's weight on Jupiter?

40 N

A cat has a mass of 4 kg. What is the cat's weight?

-5 m/s/s

A roller coaster is moving 25 m/s at the bottom of a hill. Three seconds later it reaches the top of the hill moving at 10 m/s. What was the acceleration of the coaster?

8 m/s/s

A roller coaster's velocity at the top of a hill is 10 m/s. Two seconds later it reaches the bottom of the hill with a velocity of 26 m/s. What was the acceleration of the coaster?

.83 m/s/s

A train moves from rest to a speed of 25 m/s in 30 seconds. What is its acceleration?

48 km/hr

A train travels 120 km in 2 hours and 30 min. What is the average speed?

Newton's first law of motion

An object at rest stays at rest unless acted upon by an unbalanced force. An object in motion stays in motion unless acted upon by an unbalanced force.

Newton's second law of motion

F=ma

Newton's third law of motion

For every action there is an equal and opposite reaction

.706 m/s/s

If a train going 60 m/s hits the brakes, and it takes the train 1 minute 25 seconds to stop, what is the train's acceleration?

20 m/s/s

Joyce kicked a 2 kg soccer ball with a force of 40 N. What was the acceleration of the soccer ball?

10

On earth, the weight of an object in Newtons is approximately this many times bigger than the mass of the object in kg.

8.3 m/s

Pete is driving down 7th street. He drive 150 meters in 18 seconds. Assuming he does not speed up or slow down, what is his speed in meters per second?

average speed

The total distance traveled divided by the time it took to cover that distance

9.8 m/s/s

What is the approximate acceleration due to gravity on earth?

unbalanced force

What type of force results in a change in acceleration?

balanced force

What type of force results in no acceleration. (constant speed)?

acceleration

the change in velocity over time

velocity

the speed and direction of a moving object

inertia

the tendency of objects to resist a change in motion

triple beam balance

the tool used to measure mass

spring scale

the tool used to measure weight