Motion

Question 1

What is motion?

Answer 1

State in which one object’s distance from another is changing

Question 2

What is reference point?

Answer 2

Place or object used for comparison to determine if an object is in motion (Stationary is best)

Question 3

How to determine if an object is in motion?

Answer 3

If it’s distance (position) changes relative to a reference point

Question 4

What is slope?

Answer 4

Change in y over change in x

y2-y1 / x2 - x1

Question 5

What is speed?

Answer 5

Scalar quantity that refers to how fast an object is moving. Speed can be thought of as the rate at which an object covers a distance
S = D/T
(D = T * S)
T = D/S

Question 6

What is instantaneous speed?

Answer 6

Speed of an object in a given moment

Question 7

What is average speed?

Answer 7

Calculated by the distance that an object traveled over a given interval of time

Average speed = Total distance / Total time

Question 8

What is your speed if you traveled 300 km in 5 hrs?

Answer 8

60 km/hr

Question 9

If a horse runs 24 m in 4 secs what is its speed?

Answer 9

6 m/s

Question 10

A cyclist travels 15 kg in the first leg of an event. 18 km in the second. 20 km in the final leg. First two legs take 1.5 hrs and the final leg took 1 hr. What is the average speed of the cyclist during this event?

Answer 10

21.2 km/hr

Question 11

How far can you travel at 80 km/hr in 5 hrs?

Answer 11

400 km

Question 12

How long would it take to travel 250 km at 50 km/hr?

Answer 12

5 hr

Question 13

What is velocity?

Answer 13

Rate of change in a given direction

Question 14

A school bus is driving east and there are two spots 500 meters apart. What is the average velocity if it takes 50 secs to get from one stop to the next?

Answer 14

10 m/s east

Question 15

A car drives northward past a school at 13 m/s. It takes 30 secs to cross the school grounds. How wide is the school property?

Answer 15

390 m

Question 16

A plane taking off at the airport travels west down the runway at an average velocity of 40 m/s. The runway is 120 meters long. How long does it take for the plane to reach the end of the runway?

Answer 16

3 seconds

Question 17

What is acceleration?

Answer 17

Rate at which velocity changes (a change in speed or direction)

Question 18

What happens when there is a change in direction?

Answer 18

Acceleration increases

Question 19

What is the formula for acceleration?

Answer 19

*make sure to square the units of time

(Final velocity - initial velocity) / Time

Question 20

A parachute on a racing dragster opens and changes the speed of the car from 90 m/s to 35 m/s in a period of 4.0 seconds. What is the acceleration of the dragster?

Answer 20

-13/75 m/s^2

Question 21

A child in a merry-go-round accelerates because the child is….

Answer 21

Always changing direction

Question 22

During the first 4 minutes of the game, Flyers captain Claude Giroux fires a slap shot past Capital goalie Ilya Samsonov making it a three goal lead. The puck traveled 15 meters in 0.8 seconds. Calculate the speed of the puck.

Answer 22

18.75 m/s

Question 23

Suppose a cyclist travels 20 kilometers during the first leg of an event, 20 kilometers during the second leg, and 15 kilometers during the final leg. Combined the first two legs take 3 hours while the final leg only takes 1 hour to complete. What is the average speed of the cyclist during this entire event?

Answer 23

13.75 km/hr

Question 24

A big game hunter is stationed in a tree one morning. The hunter sees a deer and fires. The bullet travels 550 meters northwest in 2 seconds and misses the deer embedding in a nearby tree. The deer then runs 100 meters east. Calculate the velocity of the bullet.

Answer 24

275 m/s northwest

Question 25

A roller coaster car rapidly picks up speed as it rolls down a slope. As it starts down the slope, its speed is 10 m/s. But 5 seconds later, at the bottom of the slope, its speed is 35 m/s. Calculate the acceleration of the coaster car.

Answer 25

5 m/s/s

Question 26

A sports car is at the drag strip for a day of racing. The car is staged (at rest) at the start of the track waiting for the light to turn green. The car launches from the start and reaches the finish line 10.0 seconds later traveling at a speed of 25 m/s. Calculate the acceleration of the car.

Answer 26

2.5 m/s/s

Question 27

(T/F) A car moving with a constant velocity is a car with zero acceleration.

Answer 27

True