Question 1

A car moves along a straight road at a constant velocity of $$12\ 	ext{m/s}$$ for $$3\ 	ext{s}. $$What is the displacement of the car during this interval?

Accepted Answer

$$36\ 	ext{m}$$

Question 2

The slope at a point on a position-versus-time graph of an object represents:

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

If an object is speeding up, its acceleration:

Accepted Answer

Can be positive or negative depending on the direction of motion.

Question 6

A 1-pound ball and a 100-pound ball are dropped from a height of $$10\ 	ext{ft} at $$the same time. In the absence of air resistance, which ball hits the ground first?

Accepted Answer

The two balls end in a tie.

Question 7

For an object in uniform motion, which equation correctly relates displacement $$\Delta x to $$velocity $$v$$ and time interval $$\Delta t$$?

Accepted Answer

$$\Delta x = v \Delta t$$

Question 8

A train travels $$12\ 	ext{km} in$$ $$10\ 	ext{min} at $$constant speed. How long will it take to travel $$60\ 	ext{km} at $$the same speed?

Accepted Answer

$$50\ 	ext{min}$$

Question 9

The instantaneous velocity of an object at time $$t is $$best described as:

Accepted Answer

The slope of the tangent line to the position-versus-time graph at time $$t.$$

Question 10

A car accelerates from rest at $$2.0\ 	ext{m/s}^2$$ for $$5.0\ 	ext{s}. $$What is its final velocity?

Accepted Answer

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

Question 11

A lion accelerates from rest at $$9.5\ 	ext{m/s}^2$$ for $$0.5\ 	ext{s}. $$What is its speed after $$0.5\ 	ext{s}$$?

Accepted Answer

$$4.75\ 	ext{m/s}$$

Question 12

A car slows from $$15\ 	ext{m/s} to$$ $$0\ 	ext{m/s} in$$ $$1.5\ 	ext{s}. $$What is its acceleration?

Accepted Answer

Question 13

A Boeing 747 accelerates at $$2.6\ 	ext{m/s}^2$$ from rest to a takeoff speed of $$70\ 	ext{m/s}. $$What minimum length of runway is required?

Accepted Answer

$$940\ 	ext{m}$$

Question 14

A springbok jumps straight up with an initial speed of $$7.0\ 	ext{m/s}. $$How high does it go? (Use $$g = 9.8\ 	ext{m/s}^2)$$

Accepted Answer

$$2.5\ 	ext{m}$$

Question 15

A rock is dropped from rest from a height of $$100\ 	ext{m}. $$How long does it take to hit the ground? (Use $$g = 9.8\ 	ext{m/s}^2)$$

Accepted Answer

$$4.5\ 	ext{s}$$

Question 16

At the highest point of its trajectory, the instantaneous acceleration of a ball tossed straight up is:

Accepted Answer

Negative.

Question 17

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 18

For motion with constant acceleration, which equation relates displacement $$\Delta x to $$initial velocity $$v_i$$, acceleration $$a$$, and time $$t$$?

Accepted Answer

$$\Delta x = v_i t + \frac{1}{2} a t^2$

Question 19

A drag racer starts from rest and travels $$6.0\ 	ext{m} in$$ $$1.0\ 	ext{s}$$ with constant acceleration. How far will it travel in $$5.0\ 	ext{s}$$?

Accepted Answer

$$150\ 	ext{m}$$

Motion in One Dimension: Study Notes (Chapter 2, College Physics)

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드