Question 1

A car travels east with a constant velocity of $$20\ \mathrm{m/s}$$ for $$10\ \mathrm{s}$$, then accelerates uniformly to $$40\ \mathrm{m/s}$$ over the next $$5\ \mathrm{s}. $$What is the car's average acceleration during the acceleration phase?

Accepted Answer

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

Question 2

Which of the following best describes the difference between displacement and distance traveled?

Accepted Answer

Displacement is the change in position and can be negative, while distance is the total path length and always positive.

Question 3

A ball is thrown straight up with an initial velocity of $$15\ \mathrm{m/s}. $$Neglecting air resistance, what is the maximum height reached by the ball? (Use $$g = 9.8\ \mathrm{m/s^2$})$$

Accepted Answer

$$11.5\ \mathrm{m}$$

Question 4

A cyclist moves with a velocity of $$5\ \mathrm{m/s}$$ north and then accelerates at $$2\ \mathrm{m/s^2$}$$ north for $$3\ \mathrm{s}. $$What is the final velocity?

Accepted Answer

$$11\ \mathrm{m/s}$$ north

Question 5

A projectile is launched horizontally from a $$45\ \mathrm{m}$$ high cliff. How long does it take to hit the ground? (Use $$g = 9.8\ \mathrm{m/s^2$})$$

Accepted Answer

$$2.0\ \mathrm{s}$$

Question 6

Which of the following statements about Newton's Third Law is correct?

Accepted Answer

The action and reaction forces are equal in magnitude and opposite in direction, but act on different objects.

Question 7

A $$2\ \mathrm{kg}$$ block is pulled across a frictionless surface by a net force of $$10\ \mathrm{N}. $$What is its acceleration?

Accepted Answer

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

Question 8

A runner accelerates from rest at $$3\ \mathrm{m/s^2$}$$ for $$4\ \mathrm{s}. $$What is the runner's displacement during this time?

Accepted Answer

$$24\ \mathrm{m}$$

Question 9

If a car is moving in a circle at constant speed, which of the following is true about its velocity and acceleration vectors?

Accepted Answer

Velocity and acceleration are perpendicular.

Question 10

A $$0.5\ \mathrm{kg}$$ ball is dropped from a height of $$20\ \mathrm{m}. $$What is its velocity just before hitting the ground? (Neglect air resistance, $$g = 9.8\ \mathrm{m/s^2$})$$

Accepted Answer

$$19.8\ \mathrm{m/s}$$

Question 11

A person pushes a $$10\ \mathrm{kg}$$ box with a force of $$30\ \mathrm{N} to $$the right. If friction provides a $$10\ \mathrm{N}$$ force to the left, what is the acceleration of the box?

Accepted Answer

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

Question 12

A ball is thrown horizontally from a $$20\ \mathrm{m}$$ high building with a speed of $$10\ \mathrm{m/s}. $$How far from the base of the building does the ball land? (Use $$g = 9.8\ \mathrm{m/s^2$})$$

Accepted Answer

$$14.3\ \mathrm{m}$$

Question 13

Which kinematic equation would you use to solve for displacement when initial velocity, acceleration, and time are known?

Accepted Answer

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

Question 14

A $$5\ \mathrm{kg}$$ object is at rest. A net force of $$15\ \mathrm{N}$$ acts on it for $$4\ \mathrm{s}. $$What is its final velocity?

Accepted Answer

$$4\ \mathrm{m/s}$$

Question 15

A skier slides down a frictionless incline making an angle $$	heta$$ with the horizontal. What is the acceleration of the skier?

Accepted Answer

$$g \sin 	heta$$

Question 16

A car starts from rest and accelerates uniformly at $$2\ \mathrm{m/s^2$}$$ for $$8\ \mathrm{s}. $$What is its final velocity?

Accepted Answer

$$16\ \mathrm{m/s}$$

Question 17

Which of the following is a correct statement of Newton's First Law?

Accepted Answer

An object will remain at rest or move with constant velocity unless acted upon by a net external force.

Question 18

A $$3\ \mathrm{kg}$$ object moves with a velocity of $$4\ \mathrm{m/s}$$ east. What is the momentum of the object?

Accepted Answer

$$12\ \mathrm{kg\cdot m/s}$$\ east

Question 19

A student throws a rock horizontally from a bridge $$25\ \mathrm{m}$$ above a river. If the rock lands $$20\ \mathrm{m}$$ from the base of the bridge, what was its initial speed? (Use $$g = 9.8\ \mathrm{m/s^2$})$$

Accepted Answer

$$8.8\ \mathrm{m/s}$$

Kinematics and Newton's Laws: Exam 1 Review Study Notes

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드