Question 1

A ball is thrown straight up with an initial velocity of $$10\ \mathrm{m/s}. $$Ignoring air resistance, what is the velocity of the ball when it returns to its original height?

Accepted Answer

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

Question 2

Which of the following statements about velocity and acceleration is correct?

Accepted Answer

If velocity is constant, acceleration must be zero.

Question 3

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

Accepted Answer

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

Question 4

Which kinematic equation would you use to find the displacement $$x of an $$object with constant acceleration $$a$$, initial velocity $$v_0$$, and time $$t$$?

Accepted Answer

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

Question 5

A projectile is launched horizontally from a cliff. Which statement is true about its motion?

Accepted Answer

Its horizontal and vertical motions are independent.

Question 6

If a position vs. time graph is a straight line with a positive slope, what does this indicate about the object's motion?

Accepted Answer

The object is moving at a constant velocity.

Question 7

A runner moves $$100\ \mathrm{m}$$ east, then $$60\ \mathrm{m}$$ west. What is the magnitude of the displacement?

Accepted Answer

$$40\ \mathrm{m}$$

Question 8

Which of the following best describes the area under a velocity vs. time graph?

Accepted Answer

It represents the object's displacement.

Question 9

A car travels at $$20\ \mathrm{m/s}$$ for $$4\ \mathrm{s}$$, then at $$10\ \mathrm{m/s}$$ for $$6\ \mathrm{s}. $$What is the average velocity over the $$10\ \mathrm{s}$$?

Accepted Answer

$$15\ \mathrm{m/s}$$

Question 10

Which of the following is true about vectors?

Accepted Answer

Vectors have both magnitude and direction.

Question 11

A stone is dropped from rest from a height of $$45\ \mathrm{m}. $$What is its velocity just before hitting the ground? (Use $$g = 9.8\ \mathrm{m/s^2$})$$

Accepted Answer

$$21.0\ \mathrm{m/s}$$

Question 12

Which of the following is the correct method to find the resultant of two perpendicular vectors $$A$$ and $$B$$?

Accepted Answer

$$\sqrt{A^2$ + B^2$}$$

Question 13

A car moves with a velocity of $$30\ \mathrm{m/s}$$ north for $$2\ \mathrm{min}. $$What is the total displacement?

Accepted Answer

$$3600\ \mathrm{m}$$

Question 14

If the acceleration of an object is zero, which of the following must be true?

Accepted Answer

The object moves with constant velocity.

Question 15

A ball is thrown horizontally from a $$20\ \mathrm{m}$$ high cliff. How long does it take to hit the ground? (Use $$g = 9.8\ \mathrm{m/s^2$})$$

Accepted Answer

$$2.02\ \mathrm{s}$$

Kinematics, Vectors, and Projectile Motion: Physics with Calculus Study Notes

Guida di studio - Domande di pratica

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