Question 1

A car accelerates uniformly from rest to a velocity of $$20\ \mathrm{m/s} in$$ $$5\ \mathrm{s}. $$What is the car's acceleration?

Accepted Answer

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

Question 2

Which of the following best describes the difference between mass and weight?

Accepted Answer

Mass is a scalar quantity representing the amount of matter, while weight is a vector quantity representing the gravitational force acting on that mass.

Question 3

A ball is thrown vertically upward 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

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

Accepted Answer

$$F = m a$$

Question 5

A $$2\ \mathrm{kg}$$ block slides down a frictionless incline of height $$5\ \mathrm{m}. $$What is its speed at the bottom?

Accepted Answer

$$9.9\ \mathrm{m/s}$$

Question 6

A $$0.5\ \mathrm{kg}$$ ball moving at $$4\ \mathrm{m/s}$$ collides elastically with a stationary $$0.5\ \mathrm{kg}$$ ball. What is the velocity of the first ball after the collision?

Accepted Answer

$$0\ \mathrm{m/s}$$

Question 7

Which of the following is true about the work done by gravity when lifting a box vertically upward?

Accepted Answer

Gravity does negative work equal to $$-mgh$$

Question 8

A $$3\ \mathrm{kg}$$ object moves in a circle of radius $$2\ \mathrm{m} at a $$constant speed of $$6\ \mathrm{m/s}. $$What is the magnitude of the centripetal force acting on the object?

Accepted Answer

$$54\ \mathrm{N}$$

Question 9

Which of the following statements about conservation of energy is correct?

Accepted Answer

The total energy of an isolated system remains constant over time.

Question 10

A $$5\ \mathrm{kg}$$ object is moving at $$2\ \mathrm{m/s}. $$What is its momentum?

Accepted Answer

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

Question 11

A $$0.2\ \mathrm{kg}$$ ball is attached to a string and swung in a horizontal circle of radius $$0.5\ \mathrm{m} at$$ $$3\ \mathrm{m/s}. $$What is the tension in the string?

Accepted Answer

$$3.6\ \mathrm{N}$$

Question 12

Which of the following is a correct statement about the first law of thermodynamics?

Accepted Answer

The change in internal energy of a system equals the heat added to the system minus the work done by the system.

Question 13

A $$0.3\ \mathrm{kg}$$ block is attached to a spring and oscillates with an angular frequency of $$5\ \mathrm{rad/s}. $$What is the spring constant $$k$$?

Accepted Answer

$$7.5\ \mathrm{N/m}$$

Question 14

Which of the following is true about elastic collisions?

Accepted Answer

Both kinetic energy and momentum are conserved.

Question 15

A $$10\ \mathrm{kg}$$ box is at rest on a horizontal surface. The coefficient of static friction is $$0.4. $$What is the maximum force that can be applied before the box starts to move? (Use $$g = 9.8\ \mathrm{m/s^2$})$$

Accepted Answer

$$39.2\ \mathrm{N}$$

Question 16

Which of the following best describes the second law of thermodynamics?

Accepted Answer

The entropy of an isolated system never decreases; it tends to increase over time.

Question 17

A $$0.5\ \mathrm{kg}$$ object rotates about a fixed axis at a radius of $$0.2\ \mathrm{m}$$ with an angular velocity of $$10\ \mathrm{rad/s}. $$What is its angular momentum?

Accepted Answer

$$1\ \mathrm{kg\cdot m^2$/s}$$

Question 18

Which of the following is a correct statement about equilibrium?

Accepted Answer

An object in equilibrium has zero net force and zero net torque acting on it.

Question 19

A $$1\ \mathrm{kg}$$ block is dropped from a height of $$10\ \mathrm{m}. $$What is its velocity just before hitting the ground? (Neglect air resistance, $$g = 9.8\ \mathrm{m/s^2$})$$

Accepted Answer

$$14\ \mathrm{m/s}$$

PHYS 2001 College Physics I – Comprehensive Study Guide

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