Question 1

Which of the following statements best describes a vector quantity?

Accepted Answer

It has magnitude and direction.

Question 2

A car starts from rest and reaches a velocity of $$20\ \mathrm{m/s} in$$ $$4\ \mathrm{s}. $$What is its acceleration?

Accepted Answer

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

Question 3

Which of the following is a scalar quantity?

Accepted Answer

Mass

Question 4

A ball is thrown straight up and returns to its original position. Compared to its initial speed after release, its speed at the instant it returns is:

Accepted Answer

The same

Question 5

Which equation correctly relates acceleration, change in velocity, and time interval?

Accepted Answer

$$a = \dfrac{\Delta v}{\Delta t}$$

Question 6

A freely falling object starts from rest. What is its velocity after $$3\ \mathrm{s}$$? (Assume $$g = 9.8\ \mathrm{m/s^2$})$$

Accepted Answer

$$29.4\ \mathrm{m/s}$$

Question 7

Which of the following scenarios describes an object with zero acceleration?

Accepted Answer

A car moving at constant speed on a straight road

Question 8

If a bicycle goes from rest to $$5\ \mathrm{km/h} in$$ $$2.5\ \mathrm{s}$$, what is its acceleration in $$\mathrm{m/s^2$}$$?

Accepted Answer

$$0.56\ \mathrm{m/s^2$}$$

Question 9

Which statement about acceleration due to gravity is correct?

Accepted Answer

It is approximately $$9.8\ \mathrm{m/s^2$}$$ near Earth's surface.

Question 10

A car travels $$100\ \mathrm{km} in$$ $$2\ \mathrm{h}$$ and then $$50\ \mathrm{km} in$$ $$1\ \mathrm{h}. $$What is its average speed?

Accepted Answer

$$50\ \mathrm{km/h}$$

Question 11

Which of the following is NOT a physical quantity related to motion?

Accepted Answer

Temperature

Question 12

An object is thrown upward with velocity $$v_0. $$What is its velocity at the maximum height?

Accepted Answer

$$0$$

Question 13

Which of the following best describes instantaneous speed?

Accepted Answer

The speed at a specific instant, as shown on a speedometer

Question 14

A rock is dropped from a cliff and falls for $$5\ \mathrm{s}. $$How far does it fall? (Use $$g = 9.8\ \mathrm{m/s^2$})$$

Accepted Answer

$$122.5\ \mathrm{m}$$

Question 15

Which of the following is true about velocity and acceleration?

Accepted Answer

If velocity and acceleration are in the same direction, the object speeds up.

Question 16

A car increases its speed from $$60\ \mathrm{km/h} to$$ $$65\ \mathrm{km/h} in$$ $$2.5\ \mathrm{s}. $$What is its acceleration in $$\mathrm{m/s^2$}$$?

Accepted Answer

$$0.56\ \mathrm{m/s^2$}$$

Question 17

Which formula gives the distance fallen by an object in free fall from rest after time $$t$$?

Accepted Answer

$$d = \dfrac{1}{2}gt^2$

Question 18

Which of the following is a correct statement about vectors?

Accepted Answer

Vectors have both magnitude and direction.

Question 19

A ball is thrown upward with velocity $$15\ \mathrm{m/s}. $$How long does it take to reach its maximum height? (Use $$g = 9.8\ \mathrm{m/s^2$})$$

Accepted Answer

$$1.53\ \mathrm{s}$$

Question 20

Which of the following is true about free fall motion?

Accepted Answer

The acceleration is constant and directed downward.

module 2 lecture 3: Motion, Vectors, and Acceleration

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