Unit 3: Chapter 4 Physics 1 Quizzes

A ball is dropped, at 2 seconds, the velocity of the ball is....

-20 m/s

A car is traveling at 30 m/s in a straight line. The driver applies the brakes for 3 seconds, and the car slows down to 12 m/sec. The acceleration of the car is:

-6 m/s/s

A ball is dropped, the initial velocity of the ball is...

0 m/s/s

For an object in free fall on Earth, what is the acceleration due to gravity?

1,000cm/s/s or 10m/s2

A rocket has an acceleration of 50 m/s2. How long does it take the rocket to reach a speed of 1,000 m/s starting from rest?

20 seconds

An object is thrown vertically downward with an initial velocity of 12 m/s. What will the velocity be after 2 seconds?

32 m/s

A stone is drooped from the top of a cliff. After 3 seconds, what is the approximate displacement of the stone.

45 meters

A car is rolling down a hill with an initial velocity of 20m/s. If the object has an acceleration of 5m/s/s. What is the velocity of the car after 10 seconds

70m/s

A ball is launched up in the air at 40m/s, how long will the ball be in the air before returning to it starting position?

8 seconds

A and B

A group of three students named kene, kene, and kene are graphing the position vs. time graph of an object increasing in speed. Which of the following are possible correct position vs. time graphs?

A 1,000 kg car and .01 kg tennis ball are dropped from the 3rd floor of Agee Hall. Which will hit the ground first?

Both at the same time

A yellow ball with less mass and a black ball with more mass is dropped. Assuming no air resistance, which will hit the ground first?

Both at the same time

What does the area bond between the curve and the horizontal axis of a velocity vs. time graph physically represent?

Change in position

True/false: Acceleration can not be negative

False

What type of objects do not accelerate, regardless of the force applied?

Letterhead and envelopes. No matter how hard you try, they remain stationary!

Which of the following are valid units for acceleration

M/s/s or m/s2

Vacuum

The absence of air

Terminal velocity is

The maximum speed at which an object falls due to air resistance

In a velocity vs. time graph, what does the slope represent

The rate at which the velocity changes

True/false: an object can have a negative acceleration while speeding up.

True

B, D, C

Use graph below to answer questions 7-9

A, D, C, B

Use this image for questions 2-5 and answer

A, C, D

Use this image for questions 6-8 and answer

A and A

Use this image for questions 9-10 and answer

C, A, D, B

Using the graph answer questions 1-5

What does the slope of a position vs. time graph represent?

Velocity

What does the slope of a velocity vs. time graph represent

acceleration

In a velocity vs. time graph, what does the y-intercept represent

initial velocity