Question 1

Which of the following best describes the main focus of College Physics I at Adelphi University?

Accepted Answer

Algebra-based fundamentals of mechanics, fluids, and waves.

Question 2

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 3

Which equation correctly relates work ($$W$$), force ($$F$$), and displacement ($$d) $$when the force is applied in the direction of motion?

Accepted Answer

$$W = F \cdot d$$

Question 4

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

Accepted Answer

$$3.03\ \mathrm{s}$$

Question 5

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

Accepted Answer

For every action, there is an equal and opposite reaction.

Question 6

A $$2\ \mathrm{kg}$$ object moves with a velocity of $$3\ \mathrm{m/s}. $$What is its kinetic energy?

Accepted Answer

$$18\ \mathrm{J}$$

Question 7

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

Accepted Answer

$$P = \rho g h$$

Question 8

A $$5\ \mathrm{kg}$$ object is acted on by a net force of $$15\ \mathrm{N}. $$What is its acceleration?

Accepted Answer

$$3\ \mathrm{m/s^2$}$$

Question 9

Which of the following best describes the principle of conservation of momentum?

Accepted Answer

The total momentum of a closed system remains constant if no external forces act on it.

Question 10

A rotating disk has an angular velocity $$\omega$$ and a moment of inertia $$I. $$What is its rotational kinetic energy?

Accepted Answer

$$\frac{1}{2} I \$$omega^2$$

Question 11

A $$0.5\ \mathrm{kg}$$ mass attached to a spring oscillates with a period of $$2\ \mathrm{s}. $$What is the spring constant $$k$$?

Accepted Answer

$$\pi^2$\ \mathrm{N/m}$$

Question 12

Which equation describes the speed of a wave ($$v) in $$terms of its frequency ($$f) $$and wavelength ($$\lambda$$)?

Accepted Answer

$$v = f \lambda$$

Question 13

A $$10\ \mathrm{kg}$$ box is pushed across a floor with a force of $$50\ \mathrm{N}$$, overcoming a frictional force of $$20\ \mathrm{N}. $$What is the net force on the box?

Accepted Answer

$$30\ \mathrm{N}$$

Question 14

A diver of mass $$60\ \mathrm{kg}$$ jumps off a $$10\ \mathrm{m}$$ platform. What is her speed just before hitting the water? (Neglect air resistance, $$g = 9.8\ \mathrm{m/s^2$})$$

Accepted Answer

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

Question 15

Which of the following is a correct statement about the center of mass?

Accepted Answer

It is the point where the mass of a system can be considered to be concentrated for translational motion.

Question 16

A $$1.5\ \mathrm{kg}$$ ball moving at $$4\ \mathrm{m/s}$$ collides elastically with a stationary $$2.5\ \mathrm{kg}$$ ball. What is the total momentum before the collision?

Accepted Answer

$$6\ \mathrm{kg\cdot m/s}$$

Question 17

Which of the following best describes simple harmonic motion?

Accepted Answer

Motion where the restoring force is proportional to displacement and directed toward equilibrium.

Question 18

A hydraulic lift uses a small piston of area $$0.01\ \mathrm{m^2$}$$ and a large piston of area $$0.5\ \mathrm{m^2$}. If a $$force of $$100\ \mathrm{N} is $$applied to the small piston, what is the maximum weight that can be lifted by the large piston (neglecting friction)?

Accepted Answer

$$5000\ \mathrm{N}$$

Question 19

Which of the following is a real-world example of conservation of angular momentum?

Accepted Answer

A figure skater spinning faster when pulling in her arms.

College Physics I (Phys 0156-111-001) Course Overview and Study Guide

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