Question 1

Which of the following best describes the difference between kinematics and dynamics in mechanics?

Accepted Answer

Kinematics studies how things move, while dynamics studies why things move.

Question 2

A car travels 120 meters in 10 seconds. What is its average speed?

Accepted Answer

$$12\ \mathrm{m/s}$$

Question 3

Which of the following statements about displacement is correct?

Accepted Answer

Displacement is a change in position and is a vector quantity.

Question 4

The formula for average velocity $$v_{avg}$$ when an object moves with constant acceleration is:

Accepted Answer

$$v_{avg} = \frac{v_0$ + v_f}{2}$$

Question 5

A runner accelerates from rest at $$2\ \mathrm{m/s^2$}$$ for $$5$$ seconds. What is her final velocity?

Accepted Answer

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

Question 6

If an object’s velocity and acceleration are in opposite directions, what happens to the object?

Accepted Answer

The object slows down.

Question 7

Which equation correctly relates acceleration $$a$$, initial velocity $$v_0$$, final velocity $$v$$, and time $$t$$?

Accepted Answer

$$v = v_0$ + a t$$

Question 8

A ball is thrown straight up with an initial velocity of $$20\ \mathrm{m/s}. $$How long does it take to reach its highest point? (Assume $$g = 9.8\ \mathrm{m/s^2$})$$

Accepted Answer

$$2.04\ \mathrm{s}$$

Question 9

Given the velocity-time equation $$v = 3t + 3$$, what is the acceleration of the object?

Accepted Answer

$$3\ \mathrm{m/s^2$}$$

Question 10

If the area under a velocity-time graph from $$t=0 to$$ $$t=T is$$ $$A$$, and the initial velocity is $$v_0$$, what is the velocity at time $$T$$? (Use the derived formula from the notes.)

Accepted Answer

$$v = \frac{2A}{T} - v_0$

Question 11

A cyclist moves with a constant velocity of $$8\ \mathrm{m/s}$$ for $$15$$ seconds. What is the displacement?

Accepted Answer

$$120\ \mathrm{m}$$

Question 12

Which of the following is the correct definition of instantaneous velocity?

Accepted Answer

The velocity of an object at a specific moment in time.

Question 13

A car starts from rest and accelerates uniformly at $$4\ \mathrm{m/s^2$}$$ for $$3$$ seconds. What is the distance covered?

Accepted Answer

$$18\ \mathrm{m}$$

Question 14

Which of the following equations is NOT a valid kinematic equation for constant acceleration?

Accepted Answer

$$x = x_0$ + v_0$ t + a t$$

Question 15

A stone is dropped from a height. Neglecting air resistance, what is its acceleration after 2 seconds?

Accepted Answer

$$-9.8\ \mathrm{m/s^2$}$$

Question 16

If a velocity-time graph is a straight line with a positive slope, what does this indicate about the motion of the object?

Accepted Answer

The object is accelerating at a constant rate.

Question 17

A train slows down from $$30\ \mathrm{m/s} to$$ $$10\ \mathrm{m/s} in$$ $$5$$ seconds. What is its acceleration?

Accepted Answer

$$-4\ \mathrm{m/s^2$}$$

Question 18

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

Accepted Answer

Speed is the magnitude of velocity and is a scalar, while velocity is a vector.

Question 19

A car moves with an initial velocity of $$5\ \mathrm{m/s}$$ and accelerates at $$2\ \mathrm{m/s^2$}$$ for $$4$$ seconds. What is its final velocity?

Accepted Answer

$$13\ \mathrm{m/s}$$

Question 20

Which of the following is true about the area under a velocity-time graph?

Accepted Answer

It represents the displacement of the object.

1D Kinematics: Study Notes for College Physics

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드