Question 1

A car travels in a straight line at a constant speed of 20 m/s for 15 seconds. What is the total displacement of the car during this time?

Accepted Answer

$$300\ \mathrm{m}$$

Question 2

The slope at a point on a position-versus-time graph of an object represents which of the following quantities?

Accepted Answer

The object's instantaneous velocity at that point.

Question 3

Which of the following is an example of uniform motion?

Accepted Answer

A hockey puck sliding in a straight line at a constant speed.

Question 4

The area under a velocity-versus-time graph of an object is:

Accepted Answer

The displacement of the object.

Question 5

A 1-pound ball and a 100-pound ball are dropped from a height of 10 feet at the same time. In the absence of air resistance, which statement is correct?

Accepted Answer

The two balls end in a tie.

Question 6

A train is moving due west at a constant speed. It takes 10 minutes to travel 12 km. How long will it take to travel 60 km?

Accepted Answer

$$50\ \mathrm{minutes}$$

Question 7

If an object is speeding up, which of the following is true about its acceleration?

Accepted Answer

Its acceleration can be positive or negative depending on the direction of motion.

Question 8

A car accelerates from rest at $$3\ \mathrm{m/s^2$}$$ for $$5\ \mathrm{s}. $$What is its final velocity?

Accepted Answer

$$15\ \mathrm{m/s}$$

Question 9

A ball is thrown straight up with an initial velocity of $$10\ \mathrm{m/s}. $$What is the maximum height it reaches? (Use $$g = 9.8\ \mathrm{m/s^2$})$$

Accepted Answer

$$5.1\ \mathrm{m}$$

Question 10

A velocity-versus-time graph for an object moving with constant acceleration is:

Accepted Answer

A straight line with a nonzero slope.

Question 11

A car moving at $$15\ \mathrm{m/s}$$ comes to a stop in $$1.5\ \mathrm{s}. $$What is the magnitude of its acceleration?

Accepted Answer

$$10\ \mathrm{m/s^2$}$$

Question 12

A rock is dropped from rest from a cliff and falls $$100\ \mathrm{m}$$ before hitting the ground. How long does it take to reach the ground? (Use $$g = 9.8\ \mathrm{m/s^2$})$$

Accepted Answer

$$4.5\ \mathrm{s}$$

Question 13

Which of the following statements about free fall is correct?

Accepted Answer

All objects in free fall have the same acceleration regardless of mass.

Question 14

A cyclist riding at $$20\ \mathrm{m/s}$$ comes to a complete stop in $$4\ \mathrm{s}. $$What is the average acceleration?

Accepted Answer

$$-5\ \mathrm{m/s^2$}$$

Question 15

A Boeing 747 accelerates at $$2.6\ \mathrm{m/s^2$}$$ and needs to reach a takeoff speed of $$70\ \mathrm{m/s}. $$What is the minimum runway length required?

Accepted Answer

$$940\ \mathrm{m}$$

Question 16

Which of the following best describes the relationship between displacement and time for an object moving with constant acceleration?

Accepted Answer

Displacement is proportional to the square of time.

Question 17

A ball is tossed straight up in the air. At its very highest point, the ball’s instantaneous acceleration is:

Accepted Answer

Negative.

Question 18

A drag racer, starting from rest, travels $$6.0\ \mathrm{m} in$$ $$1.0\ \mathrm{s}. If $$the car continues this acceleration for an additional $$4.0\ \mathrm{s}$$, how far from the starting line will the car be after $$5.0\ \mathrm{s}$$?

Accepted Answer

$$30\ \mathrm{m}$$

Question 19

Which of the following is true about the sign of acceleration and velocity for an object that is slowing down?

Accepted Answer

Acceleration and velocity have opposite signs.

Motion in One Dimension: Physics with Calculus Study Notes

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