Question 1

Which of the following is a derived physical quantity, rather than a fundamental one?

Accepted Answer

Velocity

Question 2

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

Accepted Answer

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

Question 3

A block of mass $$3\ \mathrm{kg}$$ slides down a frictionless incline of $$30^\circ$$ with respect to the horizontal. What is the magnitude of the force causing the block to accelerate down the incline?

Accepted Answer

$$14.7\ \mathrm{N}$$

Question 4

Which equation best describes the hydrostatic pressure at a depth $$h in a $$fluid of density $$\rho$$?

Accepted Answer

$$P = \rho g h$$

Question 5

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 6

Which of the following statements about temperature is correct?

Accepted Answer

Temperature is a measure of the average kinetic energy of the particles in a substance.

Question 7

A $$2\ \mathrm{kg}$$ block of copper ($$c = 0.39\ \mathrm{J/g\cdot K}) is $$heated from $$20^\circ\mathrm{C} to$$ $$80^\circ\mathrm{C}. $$How much heat is required?

Accepted Answer

$$46,800\ \mathrm{J}$$

Question 8

Which law states that the current through a conductor between two points is directly proportional to the voltage across the two points?

Accepted Answer

Ohm's Law

Question 9

A wire of resistance $$5\ \Omega$$ carries a current of $$2\ \mathrm{A}. $$What is the potential difference across the wire?

Accepted Answer

$$10\ \mathrm{V}$$

Question 10

Which of the following best describes the relationship between electric field $$E$$ and electric potential $$V$$?

Accepted Answer

$$E = -\frac{dV}{dx}$$

Question 11

A magnet is moved through a coil of wire, inducing a current. Which law explains this phenomenon?

Accepted Answer

Faraday's Law of Induction

Question 12

A $$0.5\ \mathrm{kg}$$ ball is thrown vertically upward with an initial velocity of $$10\ \mathrm{m/s}. $$Ignoring air resistance, what is the maximum height reached?

Accepted Answer

$$5.1\ \mathrm{m}$$

Question 13

Which of the following is NOT a property of fluids?

Accepted Answer

They resist shear stress.

Question 14

A $$1\ \mathrm{m^3$}$$ tank is filled with water ($$\rho = 1000\ \mathrm{kg/m^3$}). $$What is the weight of the water in the tank?

Accepted Answer

$$9,800\ \mathrm{N}$$

Question 15

Which of the following best describes the process of heat transfer by direct contact?

Accepted Answer

Conduction

Question 16

A $$10\ \mathrm{m}$$ long wire has a resistance of $$2\ \Omega. If $$the wire is cut in half, what is the resistance of each piece?

Accepted Answer

$$1\ \Omega$$

Question 17

Which of the following is true about magnetic field lines?

Accepted Answer

They form closed loops.

Question 18

A $$5\ \mathrm{kg}$$ object is dropped from a height of $$10\ \mathrm{m}. $$What is its velocity just before hitting the ground? (Neglect air resistance)

Accepted Answer

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

Question 19

Which of the following best describes the relationship between pressure, force, and area?

Accepted Answer

$$P = \frac{F}{A}$$

Fundamental Topics in College Physics: Overview and Key Concepts

Guida di studio - Domande di pratica

Study guide - Flashcard