Chapter 2 Laws of Motion Test

Fill in the Blank

1000

______ is the amount of matter in an object.

Mass

2000

The mass of an object times its velocity is_______. 

Momentum 

3000

_____ is a closed system, where certain measurable quantities are constant.

Conservation

4000

The product of force and length of time force is applied is called______.

Impulse

5000

Any quantity that has size and direction is a________.

Vector

Multiple Choice

1000

The measurement of distance traveled over a length of time. 

A. inertia

B. Energy 

C. mass

D. Speed

D. Speed

2000

Force Remaining after all other forces have been taken into account. 

A. force of gravity 

B. Momentum 

C. Unbalanced force

D. weight

C. Unbalanced force 

3000

The equation for Momentum is

A. I= F X t 

B. p=m X v

C. f_ab=-f_ba

D. F=0, then a=0 

B. p=m X v

4000

The equation for the Second law of motion is 

A. a=f/m or f = a X m

B. I = f X t 

C. f_ab=-f_ba

D. a = s₂-s₁/t₂-t₁

A.  a=f/m or f = a X m 

5000

The equation for the 3rd law of motion is

A. a = s₂-s₁/t₂-t₁

B.s = d/t

C. f_ab=-f_ba

D. F=0, then a=0 

C. f_ab=-f_ba

Word Problems

1000

What is the equation for the first law of motion?

 

F = 0, then a = 0

2000

What is the equation for acceleration?

a = s₂-s₁/t₂-t₁

3000

A ship is sailing with the force of 40N. The acceleration of the boat is 40km/hr. What is the mass of the ship? 

m= f/a 

m=40/40

m=1kg 

4000

A Kangaroo that has a mass of 80kg jumps at an acceleration of 4m/s. What is the amount of force he jumps with?

F = m X a 

F = 80 x 4

F = 320N

5000

If the force of a jet is 15N and a student has the mass of 60kg, what will the acceleration be? (N=1kg*1m/s)

a = f/m  

a = 15/60

a = 1/4 m/s² or .25m/s²

Short Answer

1000

What is the first law of motion?

An object at rest will remain at rest and an object in motion will remain in straight line motion at a constant speed unless acted upon by an unbalanced force. 

2000

How does the snowman lab relate to the first law of motion? 

The snowman remained in a straight-line motion at a constant speed causing it to fly forward when the car came to an abrupt stop.

3000

What is the 2nd law of motion?

Acceleration of an object is directly proportional to the force applied to that object and inversely proportional to its mass.

4000

How does the snowman lab demonstrate the 2nd law of motion?

The snow man flew further due to the direct relationship between increasing force (gravity) and therefore increasing acceleration.

5000

ToWhat is the 3rd law of motion? and how did the balloon lab demonstrate this? 

To every action there is an equal and opposite reaction. When the action of the air being released took place an opposite reaction caused the balloon to move in the other direction.

Examples

1000

Give and explain an example of the Second law of motion.

A dump truck fully loaded is going to have a slower rate of acceleration than an empty dump truck.

2000

Give and explain an example of the Third law of motion.

Two ice skaters pushing towards each other and moving backwards 

3000

What is the law of inertia the same as? 

The first law of motion

4000

Give and explain an example of the 1st law of motion.

good answer. 

5000

If the football player tackled the other player at a momentum of 250kg*m/s what was the momentum of the player hitting the ground and why? 

250kg*m/s; The total momentum before a collision is equal to the total momentum after collision.