Motion & Newtons Laws

Question 1

If two objects have different masses which object is easier to Accelerate ? Which law supports your answer?

Answer 1

The object with the least mass requires less force

Second law

Question 2

The tendency of an object to resist change in its motion is known as

Answer 2

Inertia

First law

Question 3

Speed equals distance divided by

Answer 3

Time

Question 4

On a graph showing distance versus time, a horizontal line represents an object that is

Answer 4

Not moving at all ( at rest, stopped)

Question 5

Give an example of negative acceleration

Answer 5

Car approaching a red light, a ball rolling to a stop

Question 6

If a bicyclist travels 30 km in two hours, her average speed is

Answer 6

S = D/T

15 km/h

Question 7

In speed versus time graph, a diagonal straight line shows that acceleration is

Answer 7

Constantly speeding up

Question 8

A person traveling in a car that stops suddenly keeps moving forward due to

Answer 8

Inertia

Question 9

If the action force of a bad striking a ball accelerates the ball in One Direction, the reaction force accelerates the bat in the opposite direction

Answer 9

Newtons third law

Question 10

The total distance traveled divided by the total time taken to travel the distance is

Answer 10

Average speed

Question 11

Newtons first law of motion states that an object remains at rest unless a —— force acts on it

Answer 11

Unbalanced

Question 12

They statement for every action, there is an equal but opposite reaction is a statement of

Answer 12

Newtons third law

Question 13

When I swimmer pushes the water back, the water pushes the swimmer ford. What is the reaction force in this situation?

Answer 13

They water pushing the swimmer forward (opposite)

Question 14

If you push a skateboard that has a mass of 60 kg with a force of 6N, What force will the skateboard pushback on you according to newtons third law of motion?

Answer 14

6N (it’s equal because of the third law)

Question 15

Forces that are equal in size but opposite indirection and cause no change in motion are —— forces

Answer 15

Balanced forces

Question 16

Define displacement and give an example of when displacement and distance would be equal and when they would be different

Answer 16

Displacement is the distance and direction an object is from starting point to stopping point

Question 17

What is the key factor in determining if an object is in motion?

Answer 17

Change in position relative to a reference point

Question 18

What is the motion of an object with zero acceleration?

Answer 18

At rest or at a constant speed (no change in motion)

Question 19

What is the acceleration formula

Answer 19

A = (final speed - initial speed) divided by time

Question 20

If a family took a vacation and was traveling 60 mph, how far would they have traveled after three hours?

Answer 20

180 miles

Question 21

What two things affect the momentum of a moving object?

Answer 21

Mass and velocity (size and speed)