Question 1

A car accelerates from rest along a straight line with a constant acceleration of $$2\ \mathrm{m/s^2$}. $$What is the velocity of the car after $$5$$ seconds?

Accepted Answer

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

Question 2

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

Accepted Answer

An object will remain at rest or in uniform motion unless acted upon by a net external force.

Question 3

A ball is thrown horizontally from the top of a $$20\ \mathrm{m}$$ high building with a speed of $$5\ \mathrm{m/s}. $$How far from the base of the building does the ball land? (Assume $$g = 9.8\ \mathrm{m/s^2$})$$

Accepted Answer

$$10.1\ \mathrm{m}$$

Question 4

Which equation correctly relates force, mass, and acceleration according to Newton's Second Law?

Accepted Answer

$$F = m a$$

Question 5

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

Accepted Answer

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

Question 6

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

Accepted Answer

Gravitational force

Question 7

A $$2\ \mathrm{kg}$$ block slides down a frictionless incline of height $$5\ \mathrm{m}. $$What is its speed at the bottom? (Assume $$g = 9.8\ \mathrm{m/s^2$})$$

Accepted Answer

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

Question 8

Which of the following is a correct statement about momentum in a closed system?

Accepted Answer

The total momentum remains constant if no external forces act on the system.

Question 9

A $$3\ \mathrm{kg}$$ object moving at $$2\ \mathrm{m/s}$$ collides inelastically with a $$2\ \mathrm{kg}$$ object at rest. What is the final velocity of the combined mass?

Accepted Answer

$$1.2\ \mathrm{m/s}$$

Question 10

A $$0.2\ \mathrm{kg}$$ mass attached to a spring oscillates with a period of $$0.5\ \mathrm{s}. $$What is the spring constant $$k$$?

Accepted Answer

$$63.2\ \mathrm{N/m}$$

Question 11

A $$1\ \mathrm{kg}$$ ball is swung in a horizontal circle of radius $$2\ \mathrm{m} at a $$speed of $$4\ \mathrm{m/s}. $$What is the centripetal force acting on the ball?

Accepted Answer

$$8\ \mathrm{N}$$

Question 12

Which of the following best describes the work-energy theorem?

Accepted Answer

The net work done on an object is equal to its change in kinetic energy.

Question 13

A $$0.5\ \mathrm{kg}$$ mass is attached to a string and swung in a vertical circle of radius $$1\ \mathrm{m}. $$What is the minimum speed at the top of the circle to maintain tension in the string? (Assume $$g = 9.8\ \mathrm{m/s^2$})$$

Accepted Answer

$$3.13\ \mathrm{m/s}$$

Question 14

A $$10\ \mathrm{kg}$$ box is pushed across a floor with a force of $$50\ \mathrm{N}$$, moving $$4\ \mathrm{m}$$ horizontally. How much work is done by the force?

Accepted Answer

$$200\ \mathrm{J}$$

Question 15

A $$0.3\ \mathrm{kg}$$ object is dropped from a height of $$10\ \mathrm{m}. $$What is its velocity just before hitting the ground? (Assume $$g = 9.8\ \mathrm{m/s^2$})$$

Accepted Answer

$$14.0\ \mathrm{m/s}$$

Question 16

Which of the following is true about elastic collisions?

Accepted Answer

Both kinetic energy and momentum are conserved.

Question 17

A $$5\ \mathrm{kg}$$ object moving at $$3\ \mathrm{m/s}$$ has a momentum of:

Accepted Answer

$$15\ \mathrm{kg\cdot m/s}$$

Question 18

A $$0.4\ \mathrm{kg}$$ mass oscillates on a spring with a frequency of $$2\ \mathrm{Hz}. $$What is the period of oscillation?

Accepted Answer

$$0.5\ \mathrm{s}$$

Question 19

A $$1\ \mathrm{kg}$$ object is rotating in a circle of radius $$0.5\ \mathrm{m} at an $$angular velocity of $$4\ \mathrm{rad/s}. $$What is its centripetal acceleration?

Accepted Answer

$$8\ \mathrm{m/s^2$}$$

Physics I: Mechanics and Wave Motion – Course Syllabus and Study Guide

Guida di studio - Domande di pratica

Study guide - Flashcard