Question 1

Which of the following is a vector quantity?

Accepted Answer

Displacement

Question 2

A runner completes a lap around a 400 m track and finishes where they started. What is the runner's displacement?

Accepted Answer

$$0\ \mathrm{m}$$

Question 3

Which statement best describes the relationship between distance and displacement?

Accepted Answer

Displacement is either smaller than or equal to distance.

Question 4

A car travels 100 m east, then 100 m west, ending up at its starting point. What is the total distance and displacement?

Accepted Answer

Distance: $$200\ \mathrm{m}$$, Displacement: $$0\ \mathrm{m}$$

Question 5

During a 1/8 mile drag race (201.2 m), Winnie finishes in 9.43 s. What is her average speed?

Accepted Answer

$$21.3\ \mathrm{m/s}$$

Question 6

After the drag race, Winnie returns to the starting line in 75.0 s. What is her total displacement?

Accepted Answer

$$0\ \mathrm{m}$$

Question 7

Which formula correctly defines average velocity?

Accepted Answer

$$v_{\mathrm{avg}} = \frac{\Delta x}{\Delta t}$$

Question 8

A car moves at a constant velocity of $$28\ \mathrm{m/s}$$ for $$0.20\ \mathrm{s}$$ during a driver's reaction time. What is the car's displacement during this interval?

Accepted Answer

$$5.6\ \mathrm{m}$$

Question 9

A truck travels at $$80\ \mathrm{km/h}$$ for $$0.5\ \mathrm{h}$$ and then at $$60\ \mathrm{km/h}$$ for $$1.5\ \mathrm{h}. $$What is the total distance traveled?

Accepted Answer

$$130\ \mathrm{km}$$

Question 10

If a car travels at $$25\ \mathrm{m/s}$$, what is the safe following distance according to the Ontario driver's handbook (distance traveled in $$2.0\ \mathrm{s}$$)?

Accepted Answer

$$50\ \mathrm{m}$$

Question 11

On a displacement vs. time graph, what does the slope represent?

Accepted Answer

Velocity

Question 12

On a velocity vs. time graph, what does the area under the curve represent?

Accepted Answer

Displacement

Question 13

A canoeist paddles north at $$2.0\ \mathrm{m/s}$$ for $$750\ \mathrm{s}$$, then immediately turns and paddles south at $$4.0\ \mathrm{m/s}$$ for $$375\ \mathrm{s}. $$What is the total displacement?

Accepted Answer

$$0\ \mathrm{m}$$

Question 14

Which of the following is true for non-uniform motion?

Accepted Answer

Velocity changes over time.

Question 15

A person walks east at $$2.0\ \mathrm{m/s}$$, and $$5.0\ \mathrm{s}$$ later is walking west at $$3.0\ \mathrm{m/s}. $$What is the average acceleration if east is positive?

Accepted Answer

$$-1.0\ \mathrm{m/s}^2$$ [east]

Question 16

Which equation can be used to find the final velocity $$v of an $$object under constant acceleration $$a$$ after time $$t$$, given initial velocity $$v_0$$?

Accepted Answer

$$v = v_0$ + at$$

Question 17

Which of the following kinematic equations is valid only for constant acceleration?

Accepted Answer

$$x = x_0$ + v_0$ t + \frac{1}{2} a t^2$

Question 18

A car accelerates from rest at $$3.0\ \mathrm{m/s}^2$$ for $$4.0\ \mathrm{s}. $$What is its final velocity?

Accepted Answer

$$12.0\ \mathrm{m/s}$$

Question 19

Which of the following best describes instantaneous velocity?

Accepted Answer

The velocity at a specific moment, found by the slope of the tangent to the displacement vs. time curve.

week 1

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