Conceptual Physical Science (6th Edition)
Conceptual Physical Science (6th Edition)
6th Edition
ISBN: 9780134060491
Author: Paul G. Hewitt, John A. Suchocki, Leslie A. Hewitt
Publisher: PEARSON
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Chapter 2, Problem 38PAC

A simple rearrangement of Newton's second law gives Fnet = ma. Show that a net force of 84 N exerted on a 12-kg package is needed to produce an acceleration of 7.0 m/s2. (Note: The units kg-m/s2 and N are equivalent.)

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Chapter 2 Solutions

Conceptual Physical Science (6th Edition)

Ch. 2 - Why doesnt a heavy object accelerate more than a...Ch. 2 - What is the net force that acts on a 10-N falling...Ch. 2 - What two principal factors affect the force of air...Ch. 2 - What is the acceleration of a falling object that...Ch. 2 - If two objects of the same size fall through air...Ch. 2 - Why does a heavy parachutist fall faster than a...Ch. 2 - Earlier in this chapter, we treated force as a...Ch. 2 - How many forces are required for a single...Ch. 2 - When you push against a wall with your fingers,...Ch. 2 - A boxer can hit a heavy bag with great force. Why...Ch. 2 - State Newtons third law.Ch. 2 - Consider hitting a baseball with a bat. 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Which on...Ch. 2 - In Chapter 1 acceleration is defined as a = vt....Ch. 2 - In this chapter we learn that the cause of...Ch. 2 - Knowing that a 1-kg object weighs 10 N. confirm...Ch. 2 - A simple rearrangement of Newton's second law...Ch. 2 - A Honda Civic hybrid weighs about 2900 pounds,...Ch. 2 - When two horizontal forces are exerted on the car...Ch. 2 - A 12-kg astronaut recedes from her spacecraft by...Ch. 2 - Madison pushes with a 160-N horizontal force on a...Ch. 2 - Sophia pushes with a 40-N horizontal force on a...Ch. 2 - A business jet of mass 30,000 kg takes off when...Ch. 2 - A rocket of mass 100,000 kg undergoes an...Ch. 2 - Calculate the horizontal force that must be...Ch. 2 - Leroy, who has a mass of 100 kg, is skateboarding...Ch. 2 - For 3.0 s, Allison exerts a net force of 10.0 N on...Ch. 2 - The heavyweight boxing champion of the world...Ch. 2 - Suzie Skydiver with her parachute has a mass of 50...Ch. 2 - If you stand next to a wall on a frictionless...Ch. 2 - A force Facts in the forward direction on a cart...Ch. 2 - A firefighter of mass 80 leg slides down a...Ch. 2 - A rock bands tour bus, mass M, is accelerating...Ch. 2 - Boxes of various masses are on a friction-free...Ch. 2 - In cases A, B, and C, the crate is in equilibrium...Ch. 2 - Consider a 100-kg box of tools in the locations A,...Ch. 2 - Three parachutists, A, B, and C, have reached...Ch. 2 - The strong man is pulled in the three situations...Ch. 2 - The Moon travels in a nearly circular path around...Ch. 2 - To pull a wagon across a lawn at constant...Ch. 2 - Your empty hand is not hurt when it bangs lightly...Ch. 2 - Why is a massive cleaver more effective for...Ch. 2 - Aristotle claimed that the speed of a falling...Ch. 2 - What is the net force acting on a 1-kg ball in...Ch. 2 - As you leap upward from the ground, how does the...Ch. 2 - "It's not the fall that hurts you; it's the sudden...Ch. 2 - For each of the following interactions, identify...Ch. 2 - You hold an apple over your head. (a) Identify all...Ch. 2 - What is the net force on an apple that weighs 1 N...Ch. 2 - Why does a cat that falls from the top of a...Ch. 2 - Free fall is motion in which gravity is the only...Ch. 2 - How does the weight of a falling body compare with...Ch. 2 - You tell your friend that the acceleration of a...Ch. 2 - We know that Earth pulls on the Moon. 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Compared with...Ch. 2 - A couple of your friends say that before a falling...Ch. 2 - How does the terminal speed of a parachutist...Ch. 2 - How does the gravitational force on a falling body...Ch. 2 - If and when Galileo dropped two balls from the top...Ch. 2 - This is a scenario common to many physics...Ch. 2 - A fanner urges his horse to pull a wagon. The...Ch. 2 - When Marie exerts a horizontal force of 200 N to...Ch. 2 - Two equal-mass blocks are connected by a length of...Ch. 2 - The bricks in this road were originally straight....Ch. 2 - Ken and Joanne are astronauts floating some...Ch. 2 - Can a clog wag its tail without the tail in turn...Ch. 2 - If you simultaneously drop a pair of tennis balls...Ch. 2 - If gravity between the Sun and Earth suddenly...Ch. 2 - A ball rolls down a curved ramp as shown. 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