If anyone can help me with the following I would really appreciate it. I missed the first few weeks of class because my brother was in the hospital after a serious crash and I have a test coming up and I was given this quiz as a study guide. Most of the stuff is pretty introductory but I really dont know where to start. Any input is greatly appreciated and will help me to study for this test.. thanks.(adsbygoogle = window.adsbygoogle || []).push({});

1. An automobile drive puts on the brakes and decelerates from 28 m/s

to zero in 12 s. What

distance does the car travel during this time?

a. 168 m b. 196 m c. 336 m d. 392 m

2. A model rocket, launched from the ground, rises vertically with

acceleration of 30 m/s2 for

two seconds when it runs out of "fuel". Disregarding air

resistance, how high will the rocket

be when it runs out of fuel?

a. 15 m b. 30 m c. 60 m d. 120 m

3. A 50-gram ball traveling at 25 m/s is bounced off a brick wall and

rebounds at 22 m/s. A high

-speed camera records this event. If the ball is in contact with

the wall for 3.5 ms, what is the

average acceleration of the ball during this time interval?

a. 13,428 m/s2 b. 6,715 m/s2 c. 857 m/s2 d. 20

m/s2

4. A bird, accelerating from rest at a constant rate, experiences a

displacement of 28 meters in

11 seconds. What is the average velocity?

a. 1.7 m/s b. 2.5 m/s c. 3.4 m/s d. zero

5. Mt. Everest is more than 8000 m high. How fast would an object be

moving if it could free

fall to sea level after being released from the top of Mt.

Everest? (Ignore air resistance)

a. 396 m/s b. 120 m/s c. 1200 m/s d.

12,000 m/s

6. Human reaction time is usually about 0.15 s. If your lab partner

holds a ruler between your

finger and thumb and releases it without warning, how far can you

expect the ruler to fall

before you catch it? The distance is about:

a. 8 cm b. 9 cm c. 10 cm d. 11cm

7. Two objects of different mass are released simultaneously from the

top of a 20 m tower and

fall to the ground. If air resistance is negligible, which

statement best applies?

a. The greater mass hits the ground first.

b. Both objects hit the ground together.

c. The smaller mass hits the ground first.

d. No conclusion can be made with the information given.

8. Jeff throws a ball straight up. For which situation is the

vertical acceleration zero?

a. On the way up

b. At the top

c. On the way back down

d. None of the above

9. A European sports car dealer claims that his car will accelerate

at a constant rate from rest

to 100 km/hr in 8.0 s. If so, what is the acceleration? (Hint:

First convert speed to m/s)

a. 3.47 m/s2 b. 6.82 m/s2 c. 11.37 m/s2 d.

17.40 m/s2

10. The value of an object's acceleration may be characterized in

equivalent words by which of

the following?

a. displacement

b. rate of change of displacement

c. velocity

d. rate of change of velocity

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# Homework Help: Help with some simple Physics pls.

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