Question 1

A motor neuron in a human can transmit a signal from the hand to the brain at a speed of $$25.0\ \mathrm{m/s}. If $$the signal takes $$40.0\ \mathrm{ms} to $$travel from the hand to the brain, what is the distance between the hand and the brain?

Accepted Answer

$$1.00\ \mathrm{m}$$

Question 2

A greyhound accelerates from rest to $$20.0\ \mathrm{m/s} in$$ $$6.0\ \mathrm{s}$$ while running a $$100\ \mathrm{m}$$ race. What distance does the greyhound cover during the acceleration phase?

Accepted Answer

$$60.0\ \mathrm{m}$$

Question 3

A cross-country skier is moving west at $$8.0\ \mathrm{m/s}$$ and slows to $$5.0\ \mathrm{m/s}$$ after gliding $$6.0\ \mathrm{m}. $$What is the skier's acceleration?

Accepted Answer

$$-3.25\ \mathrm{m/s^2$}$$\ (to\ the\ east)$

Question 4

A package is dropped from a height of $$65.0\ \mathrm{m}$$ while moving upward at $$20.0\ \mathrm{m/s}. $$What is the velocity of the package just before it hits the ground? (Assume $$g = 9.8\ \mathrm{m/s^2$}$$ downward.)

Accepted Answer

$$-40.9\ \mathrm{m/s}$$

Question 5

Which of the following is the correct SI prefix for $$10^{-6}$$?

Accepted Answer

micro ($$\mu)$$

Question 6

A car is traveling eastward and slows to a stop at a red light. Which of the following best describes the direction of its acceleration?

Accepted Answer

Westward

Question 7

Which of the following equations correctly relates final velocity, initial velocity, acceleration, and displacement for constant acceleration?

Accepted Answer

$$v_f^2$ = v_i^2$ + 2a\Delta x$$

Question 8

A runner accelerates uniformly from rest for $$6.0\ \mathrm{s} to a $$speed of $$20.0\ \mathrm{m/s}. $$What is the runner's acceleration?

Accepted Answer

$$3.33\ \mathrm{m/s^2$}$$

Question 9

A position-versus-time graph shows a straight line with a positive slope. What does this indicate about the object's motion?

Accepted Answer

Constant positive velocity

Question 10

A car is traveling west and speeds up to pass another vehicle. If east is positive, what is the sign of the car's acceleration?

Accepted Answer

Negative

Question 11

A skier glides to a stop from $$8.0\ \mathrm{m/s} to$$ $$5.0\ \mathrm{m/s}$$ over $$6.0\ \mathrm{m}. $$How long does it take for the skier to slow down?

Accepted Answer

$$0.923\ \mathrm{s}$$

Question 12

Which of the following best describes the acceleration of an object thrown straight up and then falling back down (neglecting air resistance)?

Accepted Answer

Constant and downward throughout the motion

Question 13

A position-versus-time graph is flat (horizontal) between two points. What does this indicate?

Accepted Answer

The object is at rest

Question 14

A car travels at $$20\ \mathrm{m/s}$$ for $$5.0\ \mathrm{s}$$, then at $$10\ \mathrm{m/s}$$ for $$5.0\ \mathrm{s}. $$What is the total distance traveled?

Accepted Answer

$$150\ \mathrm{m}$$

Question 15

Which of the following is the correct SI prefix for $$10^6$$?

Accepted Answer

mega ($$M)$$

Physics with Calculus Exam I Study Guidance

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