Question 1

Which of the following best describes Newton's First Law of Motion?

Accepted Answer

An object at rest remains at rest, and an object in motion remains in motion at constant velocity unless acted upon by a net external force.

Question 2

A car of mass $$m$$ accelerates from rest under a constant force $$F. $$What is the acceleration $$a of $$the car?

Accepted Answer

$$a = \frac{F}{m}$$

Question 3

Which of the following scenarios best illustrates the concept of conservation of momentum?

Accepted Answer

Two ice skaters push off from each other and move in opposite directions.

Question 4

A block slides down a frictionless incline of height $$h. $$What is its speed $$v at $$the bottom?

Accepted Answer

$$v = \sqrt{2gh}$$

Question 5

Which equation represents the work $$W$$ done by a constant force $$F$$ acting over a displacement $$d at an $$angle $$	heta to $$the direction of displacement?

Accepted Answer

$$W = Fd \cos 	heta$$

Question 6

A satellite orbits Earth in a circular path. Which force provides the necessary centripetal acceleration?

Accepted Answer

Gravitational force

Question 7

A spring with spring constant $$k is $$compressed by a distance $$x. $$What is the potential energy stored in the spring?

Accepted Answer

$$U = \frac{1}{2}kx^2$

Question 8

Which of the following is a correct statement of the First Law of Thermodynamics?

Accepted Answer

Energy cannot be created or destroyed, only transferred or transformed.

Question 9

A ball is thrown vertically upward with initial velocity $$v_0. $$What is the maximum height $$h_{max} it $$reaches?

Accepted Answer

$$h_{max} = \frac{v_0$^2}{2g}$$

Question 10

Which of the following best describes the Doppler Effect?

Accepted Answer

The change in frequency or wavelength of a wave in relation to an observer moving relative to the source of the wave.

Question 11

A solid sphere and a hollow sphere of equal mass and radius roll down an incline. Which reaches the bottom first and why?

Accepted Answer

The solid sphere, because it has a smaller moment of inertia.

Question 12

Which formula gives the pressure $$P at a $$depth $$h in a $$fluid of density $$\rho$$ under gravity $$g$$?

Accepted Answer

$$P = P_0$ + \rho gh$$

Question 13

A pendulum of length $$L$$ swings with small amplitude. What is its period $$T$$?

Accepted Answer

$$T = 2\pi \sqrt{\frac{L}{g}}$$

Question 14

Which of the following is a real-world application of Newton's Third Law?

Accepted Answer

A rocket launches by expelling gas downward, propelling itself upward.

Question 15

A student pushes a box across a rough floor at constant speed. Which statement is true about the forces acting on the box?

Accepted Answer

The force applied by the student is equal in magnitude and opposite in direction to the frictional force.

Question 16

Which equation describes the relationship between force $$F$$, mass $$m$$, and acceleration $$a$$?

Accepted Answer

$$F = ma$$

Question 17

A gas in a sealed container is heated at constant volume. What happens to the pressure?

Accepted Answer

The pressure increases.

Question 18

Which of the following best describes simple harmonic motion (SHM)?

Accepted Answer

Motion in which the restoring force is proportional to the displacement and directed toward the equilibrium position.

Question 19

A ball of mass $$m$$ moving at velocity $$v$$ collides elastically with a stationary ball of equal mass. What is the velocity of the first ball after the collision?

Accepted Answer

$$0$$

Question 20

Which of the following is a correct statement about buoyancy?

Accepted Answer

An object submerged in a fluid experiences an upward force equal to the weight of the fluid displaced.

PHY 111: General Physics I – Syllabus Overview and Topic Guide

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