Motion and Newton's laws

Question 1

2.​The tendency of an object to resist change in its motion is known as?

Answer 1

Inertia (1st law).

Question 2

3.​Speed equals distance divided by?

Answer 2

Time

Question 3

4.​On a graph showing distance versus time, a horizontal line represents an object that is not moving at all (at rest, stopped).

Answer 3

| |_/____>

/

Question 4

5.​Give an example of negative acceleration.

Answer 4

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

Question 5

6.​If a bicyclist travels 30 kilometers in two hours, her average speed is?

Answer 5

S = D/T 15 km/h.

Question 6

7.​In speed-versus-time graph, a diagonal straight line shows that acceleration is?

Answer 6

constantly speeding up

Question 7

8.​A person traveling in a car that stops suddenly keeps moving forward due to?

Answer 7

Inertia

Question 8

9.​If the action force of a bat striking a ball accelerates the ball in one direction, the reaction force accelerates the bat in the opposite direction.

Answer 8

3rd law

Question 9

10.​A roller coaster is moving at 10 m/s at the top of a hill and 22 m/s at the bottom of the hill two seconds later. What is the average acceleration?

Answer 9

A=F(s)-I(s)/T (22-10)/2= 6m/s2

Question 10

11.​The total distance traveled divided by the total time taken to travel the distance is?

Answer 10

average speed

Question 11

12.​Newton’s first law of motion states that an object remains at rest unless a(n) __________ force acts on it.

Answer 11

unbalanced force

Question 12

13.​The statement “for every action, there is an equal but opposite reaction” is a statement of?

Answer 12

newtons 3rd law

Question 13

14.​When a swimmer pushes the water back, the water pushes the swimmer forward. What is the reaction force in this situation?

Answer 13

The water pushing the swimmer forward. (opposite)

Question 14

15.​If you push a skateboard that has a mass of 60kg with a force of 6N, what force will the skateboard push back on you according to Newton’s third law of motion?

Answer 14

6N (It’s equal because of 3rd law.)

Question 15

16.​Forces that are equal in size but opposite in direction and cause no change in motion are ________ forces.

Answer 15

balanced

Question 16

24. 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

27. What is the acceleration formula?

Answer 17

A = (final speed – initial speed) / time

Question 18

35. According to Newton’s 2nd law of motion, what happens to an object when an unbalanced force is applied to it?

Answer 18

It accelerates in the direction of the force.

Review inquiry: Qualitative/quantitative observations, experimental design, control groups/constants

Question 19

34. If two bumper cars of equal mass were moving in a straight line when the ride ended, why would one bumper car take longer to come to a stop?

Answer 19

The car that is moving faster would take longer to stop since it has more momentum.

Question 20

1.​If two objects have different masses, which object is easier to accelerate? Which law supports your answer?

Answer 20

The object with the least mass requires less force– 2nd law