Q: During free fall, the acceleration of a bungee jumper is:

Constant and approximately $$10\ \text{m/s}^2$$

Question 1

A bus is moving at 100 km/h. You walk from the back to the front at 10 km/h relative to the bus. What is your speed relative to the road outside?

Accepted Answer

$$110\ 	ext{km/h}$$

Question 2

Which of the following best describes the difference between speed and velocity?

Accepted Answer

Speed is scalar, velocity is vector

Question 3

A car moves in a circular track at $$45\ 	ext{km/h}$$ with constant speed. Which statement is true?

Accepted Answer

The car has changing velocity

Question 4

A biker increases his velocity from $$2\ 	ext{m/s} to$$ $$8\ 	ext{m/s} in$$ $$3$$ seconds moving in a straight line. What is the acceleration?

Accepted Answer

$$2\ 	ext{m/s}^2$$

Question 5

What is the acceleration of a car moving along a straight road that increases speed from zero to $$100\ 	ext{km/h} in$$ $$10$$ seconds?

Accepted Answer

$$2.78\ 	ext{m/s}^2$$

Question 6

During free fall, the acceleration of a bungee jumper is:

Accepted Answer

Constant and approximately $$10\ 	ext{m/s}^2$$

Question 7

Suppose a car's velocity is to the left and its acceleration is to the right. What happens to the car?

Accepted Answer

The car slows down

Question 8

Which of the following best describes what occurs when the body accelerates?

Accepted Answer

Change in velocity per unit of time

Question 9

Galileo discovered that when air resistance can be neglected, all objects fall with the same:

Accepted Answer

Acceleration

Question 10

A ball thrown upward loses $$10\ 	ext{m/s} of $$speed each second until it reaches its highest point. What is its speed gain each second after reaching the highest point?

Accepted Answer

$$10\ 	ext{m/s}$$

Question 11

What is the value of the velocity of a ball when it reaches its maximum height?

Accepted Answer

$$0\ 	ext{m/s}$$

Question 12

What is the acceleration of the ball when it is moving up at its maximum height and when it is moving down?

Accepted Answer

$$-10\ 	ext{m/s}^2$$

Question 13

A car increases its velocity due east for $$10$$ seconds then slows down for $$2$$ seconds. What is the direction of the acceleration vector for each event?

Accepted Answer

East then West

Question 14

What factors determine whether the air resistance experienced by a falling object will affect the motion of the object?

Accepted Answer

Area and weight of the object

Question 15

What is the effect of air resistance on the acceleration of falling objects?

Accepted Answer

Air resistance decreases the acceleration

Question 16

What relationship between distance traveled and time did Galileo discover for freely falling objects released from rest?

Accepted Answer

Distance increases as the square of time

Question 17

What are we describing when we analyze the rate of change of how fast an object is moving?

Accepted Answer

Acceleration

Question 18

A ball rolling down an inclined plane each second picks up...

Accepted Answer

The same amount of speed each second

Question 19

Which of the following is a correct definition of instantaneous speed?

Accepted Answer

The speed at a specific instant in time

Question 20

When an object is thrown upward, how much speed does it lose each second ignoring air resistance?

Accepted Answer

$$10\ 	ext{m/s}$$

Linear Motion, Speed, Velocity, and Acceleration: Study Notes

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