Forces and Motion

1

100

True or false:

As the masses of 2 objects increase, their gravitational force will decrease.

False.  It will increase also.

200

Order the following in increasing gravity 

Earth, Sun, Moon, Neptune

Moon, Earth, Neptune, Sun

300

a type of acceleration that occurs in a circular path 

Centripetal accelelation 

400

Explain the 2 components of the Law of Universal Gravitational Force

Distance: Gravitational force DECREASES as distance INCREASES

Mass: Gravitational force INCREASE as mass INCREASES

500

According to the _____________:

All objects in the universe attract each other through gravitational force 

What is Law of Universal Gravitational Force

600

a push or a pull

Force

700

what is the time of an object falling at 68.6 m/s 

7 seconds

2

100

What is the mass of a truck that weighs 44,100 N? 

Explain your answer.

The mass is 4,500 Kg.

Divide the force by 9.8 

200

___________ is when a fallen object reaches constant speed.

what is Terminal Velocity 

300

a rate at which velocity changes over time

Acceleration

400

A coffee mug has a mass of 0.67 kg.  What is the weight of the mug? 

Explain.

6.57 N

multiply the mass times gravity (9.8m/s²)

500

Define mass

Amount of matter in an object 

600

A force that opposes motion between 2 surfaces that come in contact 

Friction 

700

_______________ occurs when air resistance does not affect the motion of a fallen object

what is free fall

3

100

define speed

The distance traveled by an object divided by the time taken to travel that time.

200

 gravity is 

A measure of gravitational force.

300

Is defined as an object's change in position relative to  a reference point.

Motion

400

A force of attraction  between objects that is due to their masses

Gravity 

500

Acceleration happens when any or both or the following change:

Direction or speed

600

Is defined as the speed of an object in a particular direction

Velocity 

700

True or false: Explain

16 m/s²  East is a measure of velocity 

False

unit for velocity is m/s

4

100

A car goes from 0 m/s to 200m/s in 15 seconds. What is the acceleration

a= 13 m/s²

200

what is the unit for force

Newton

300

A car travels 200 km in 80 minutes.  what is the speed of the car in Km per hour

S= 150 km/hr

400

A car goes from 0 m/s to 200m/s in 15 seconds. What is the acceleration

What formula will you use to solve this problem?

a= (Vf - Vi) / t

500

what is the acceleration of a boulder that is going down a hill with a force of 600 N and a mass of 35 kg?

acceleration is 17 m/s²

600

what are the 2 components you need to find a force

mass and acceleration 

700

Formula for speed

S= d/t