Test 1
Test 1 pt.2
test 2
100

If a falling object gains 6m/s each second it falls, what is its acceleration?

6m/s2

100

A train makes a round trip on a straight track. The first half is 300km traveling 60km/h. After 1.5h layover the train returns going 55km/h. What is the average speed? 

50.19km/h
100

The area under the curve, on a force-displacement graph, represents?

a) power

b) work

c) force

d) impulse 

Work

200

If a ball takes 2s to fall, how long does it take for a fall to fall 2m horizontally?

2s

200
A box slides down a ramp with an acceleration of 6m/s2. What is its speed after 2s if the initially had a speed of 1.2m/s?

13.2m/s

300

Moon gravity = 1.62m/s2 if a baseball is thrown straight up and returns 8.5s later. How high did the ball go and how fast is it thrown?

Thrown at 6.885 m/s 

Maximum height of 14.63 m

300

A 50g hockey puck slides across ice and is slowing down due to friction. It starts at 45m/s and ends 30m/s after it travels 100m. What is the acceleration it experiences?

-5.625m/s2

400
A rocket propelled sled moved down a track with a speed of 280m/s and were brought to rest in 1.4s. What is the negative acceleration and the distance traveled?

Negative acceleration = 200m/s2

Distance = 196m

400

A ball is projected horizontally with an initial speed of 5m/s, and subject only to gravity. What is the velocity in the x and y directions after 8s if its subject to gravity acting vertically? How far has it traveled horizontally and vertically in 5s?

8s) vx = 5m/s, vy= 78.4m/s

5s) horizontally = 25m, vertically = 122.5m

500

Jane swims 40m in 10s and immediately swims back in 15s. What is the average velocity?

0m/s

500

Ball thrown up to ledge 5m above the ground with a velocity of 30m/s at an angle of 60 degrees to the horizontal. 

a) How long does it take for the ball to reach the ledge on its way back down?

b)When the ball reaches the ledge, how far away horizontally was it when it was thrown?

c) Final velocity when it reaches the ledge?

d) Max height of the ball 

e) minimum angle for which the ball reaches the ledge?

a) The time = 5.10 s.
b) The horizontal distance = 76.5 m.
c) The final velocity = 28.3m/s
d) The maximum height = 34.44 m.
e) The minimum angle = 9.8°.

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