Question 1

Which of the following best describes a motion diagram?

Accepted Answer

A layered image showing an object's position at several equally spaced intervals of time.

Question 2

A car moves along a straight road and its position is recorded every second. The distance between each recorded position increases with each frame. What does this indicate about the car's motion?

Accepted Answer

The car is speeding up.

Question 3

Which of the following is a vector quantity?

Accepted Answer

Velocity

Question 4

A displacement vector $$\vec{\Delta r}$$ points from $$(x_1$, y_1$) to$$ $$(x_2$, y_2$). $$What is the correct formula for the displacement vector?

Accepted Answer

$$\vec{\Delta r} = (x_2$ - x_1$, y_2$ - y_1$)$$

Question 5

Which of the following statements about scalar and vector quantities is correct?

Accepted Answer

Scalars have only magnitude; vectors have magnitude and direction.

Question 6

A cyclist travels 60 km west in 2 hours. What is the average velocity?

Accepted Answer

$$30\ \mathrm{km/h}$$ west

Question 7

If a car's velocity changes from $$10\ \mathrm{m/s} to$$ $$20\ \mathrm{m/s} in$$ $$5\ \mathrm{s}$$, what is its average acceleration?

Accepted Answer

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

Question 8

Which SI unit is used to measure mass?

Accepted Answer

Kilogram ($$\mathrm{kg})$$

Question 9

A student measures the length of a table as $$2.19\ \mathrm{m}$$ using a ruler marked in $$0.1\ \mathrm{m}$$ increments. How many significant figures should the measurement have?

Accepted Answer

3

Question 10

When multiplying $$2.5\ \mathrm{m} by$$ $$3.42\ \mathrm{m}$$, how many significant figures should the answer have?

Accepted Answer

2

Question 11

A runner moves from position $$x_0 = 0$$\ \mathrm{m}$$ to x_1$ = 100\ \mathrm{m} in$$ $$10\ \mathrm{s}. $$What is the runner's average speed?

Accepted Answer

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

Question 12

Which of the following is NOT a fundamental SI unit?

Accepted Answer

Newton ($$\mathrm{N})$$

Question 13

A car accelerates from rest to $$30\ \mathrm{m/s} in$$ $$15\ \mathrm{s}. $$What is its average acceleration?

Accepted Answer

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

Question 14

Which prefix represents $$10^{-3} in SI $$units?

Accepted Answer

Milli-

Question 15

A motion diagram shows a series of dots closer together at the beginning and farther apart at the end. What does this indicate?

Accepted Answer

The object is speeding up.

Question 16

If you add two vectors $$\vec{A}$$ and $$\vec{B}$$, which graphical method is correct?

Accepted Answer

Place the tail of $$\vec{B} at $$the tip of $$\vec{A}$$ and draw the resultant from the tail of $$\vec{A} to $$the tip of $$\vec{B}.$$

Question 17

A measurement is recorded as $$0.00620. $$How many significant figures does this value have?

Accepted Answer

3

Question 18

Which of the following best describes the difference between translational and rotational motion?

Accepted Answer

Translational motion involves movement along a path; rotational motion involves spinning about an axis.

Question 19

A student converts $$2.00\ \mathrm{ft} to $$centimeters using the conversion $$1\ \mathrm{in} = 2.54\ \mathrm{cm}$$ and $$1\ \mathrm{ft} = 12\ \mathrm{in}. $$What is the correct value in centimeters?

Accepted Answer

$$60.96\ \mathrm{cm}$$

Question 20

A car's position is given by $$x(t) = 5t^2$ where x$ is in meters and t$ in seconds. What is the car's velocity at t = 3$$\ \mathrm{s}$$?

Accepted Answer

$$30\ \mathrm{m/s}$$

Fundamental Concepts of Motion in Physics

Guida di studio - Domande di pratica

Study guide - Flashcard