physics unit 3

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What is the speed of an object at rest?

0.0 m/s

according to the graph above, during which interval does the cat have the greatest positive velocity

0.0-5.0s

a ball is thrown straight up. at the top of its path its velocity is

0m/s^2

according to the graph above, the cat has the fastest speed during which interval

10-15 sec

According to the graph above, the cat has the fastest speed during which interval?

10-15s

Acceleration due to gravity is also called

free-fall acceleration

acceleration due to gravity is also called

free-fall acceleration

which does the graph illustrate about acceleration.

goes up then down then up. the acceleration varies

When you look at the speedometer in a moving car, you can see the car's

instantaneous speed

the graph above describes the motion of a cyclist. the graph illustrates that the acceleration of the cyclist

is constant

what is the SI unit of acceleration

m/s/s

What is the SI unit of acceleration?

m/s^2

The graph above describes the motion of a ball. At what point is the velocity of the ball equal to its velocity at B?

not A, c or d

Suppose you are given a position versus time graph. The slope of this graph describes what quantity?

velocity

Acceleration is defined as the CHANGE in

velocity divided by the time interval

acceleration is defined as the change in

velocity divided by the time interval

Which of the following line segments on a position versus time graph is physically impossible?

vertical line

In the graph above, a toy car rolls from +3 m to +5 m. Which of the following statements is true?

xi = +3 m

In the graph above, a toy car rolls from +3m to +5m. Which of the following statements is true?

xi= + 3m

Suppose you are in a car that is going around a curve. The speedometer reads a constant 30 miles per hour. Which of the following is NOT true?

your velocity is constant

zander is walking in the quad minding his own business when all of a sudden he feels bird poop hit his head. chase noticed the poop fell for about 5 sec. how high above the ground was the bird when he made the decision to bomb zander?

122.5 m

Zander is walking in the quad minding his own business when all of a sudden he feels something hit his head. Chase starts to laugh and tells Zander that a bird just pooped on him. Chase noticed that the poop fell for 3 seconds. How high above the ground was the bird when he made the decision to bomb Zander.

44.1 m

according to the graph above, during which interval FIX

5-10 s

According to the graph above, during which interval is the cat at rest?

5-10s

A ball is thrown straight up. At the top of its path its acceleration is

9.8m/s/s

Which of the following situations represents a negative displacement? (Assume positive position is measured vertically upward along a y-axis.)

A cat jumps from a tree limb to the ground.

The graph above describes the motion of a ball. At what point does the ball have a velocity of zero?

C

The graph above describes the motion of a ball. At what point is the speed of the ball equal to its speed at B?

D

In the graph above, how does the acceleration at A compare with the acceleration at B?

The accelerations at A and B are each zero.

which of the following situations represents. a positive displacement? assume positive positions measured vertically upward along a y-axis

a cat jumps from the ground onto a tree limb

Suppose an object is in free fall. Each second the object falls

a larger distance than in the second before

Speed is

a measure of how fast something is moving. always measured in terms of a unit of distance divided by a unit of time. the distance covered per unit time.

which of the following line segments on a position vs time graph is physically impossible

a vertical line

In the absence of air resistance, objects fall at constant

acceleration

in the absence of air resistance, objects fall at a constant

acceleration

suppose you are given a velocity vs time graph. the slope of this graph describes what quantity

acceleration

when you look at the odometer in a moving car, you can see the cars

average distance traveled

the graph above describes the motion of a ball. at what point does the ball have a velocity of 0

c

If you drop a feather and a coin at the same time in a tube filled with air, which will reach the bottom of the tube first?

coin

The graph above describes the motion of a cyclist. The graph illustrates that the acceleration of the cyclist

constant

the graph above describes the motion of a ball. at what point is the speed of the ball equal to the speed at b

d

If you know the acceleration of a car, its initial velocity, and the time interval, which of the following can you predict?

displacement of the car, direction of the cars final velocity, magnitude of the cars final velocity

speed is

distance covered per unit of time, measure of how fast something is moving, always measured in terms of a unit of distance divided by a unit of time

The graph above describes the motion of a cyclist. During the interval shown, the cyclist is

speeding up

The graph above describes the motion of a cyclist. during the interval shown the cyclist is

speeding up

in the graph above how does the acceleration at A compare with the acceleration at b

the acceleration at a and b are 0

When a car's velocity is positive and its acceleration is negative, what is happening to the car's motion?

the car slows down

When a car's velocity is negative and its acceleration is negative, what is happening to the car's motion?

the car speeds up

when a cars velocity is positive and its acceleration is positive, what os happening to the cars motion

the car speeds up

a ball is thrown upwards and then caught when it comes back down. in the absence of air resistance the speed of the ball at the halfway mark on its way back down would be

the same as the speed it had when thrown upwards

A ball is thrown upwards and caught when it comes back down. In the absence of air resistance, the speed of the ball when caught would be

the same as the speed it had when thrown upwards. (no air resistance)


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