Bundle: Inquiry Into Physics, 8th + Webassign Printed Access Card For Ostdiek/bord's Inquiry Into Physics, 8th Edition, Single-term
8th Edition
ISBN: 9781337605045
Author: Vern J. Ostdiek, Donald J. Bord
Publisher: Cengage Learning
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Chapter 3, Problem 8C
To determine
To prove:
The work done by a force is equal to the kinetic energy of the object.
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Since the initial potential energy and final kinetic energy are zero, our equation now becomes
EP,f = EK,i.
We can then substitute the formula for kinetic energy,
EK = 1/2mv2,
and the formula for gravitational potential energy,
EP = mgh,
mghf = 1/2mvi2.
Now it's just a matter of doing the algebra, solving for the final height
hf,
and substituting values to find
hf.
Notice that the mass m divides out of both sides of the equation, so the value of the mass is not needed to find the final height.
Calculate the maximum height of the ball in meters.
hf = __________ m
From a building which is 60 meters height, a ball was thrown horizontally with kinetics energy of 45 Joules. If the ball weighs 300 grams, compute for the ball’s kinetic energy when it touches the ground. Give your answer in Joules. (KE = 1/2mV1^2)
Write your name and date. This problem should be solved using the principles of Energy Conservation found in Chapter 3.
Write the kinetic, potential and total energy of a baseball having a mass of 0.145kg held at rest 10 meters above the ground.
The baseball is released. Under the influence of gravity on Earth, it freefalls to the ground. Assuming the air resistance is negligible, write the kinetic, potential and total energy of the baseball at the instant when the baseball hits the earth.
What is the baseball’s final speed when it impacts the ground using the principles of Energy Conservation?
Chapter 3 Solutions
Bundle: Inquiry Into Physics, 8th + Webassign Printed Access Card For Ostdiek/bord's Inquiry Into Physics, 8th Edition, Single-term
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- Rank the following quantities of energy from largest to the smallest. State if any are equal. (a) the absolute value of the average potential energy of the SunEarth system (b) the average kinetic energy of the Earth in its orbital motion relative to the Sun (c) the absolute value of the total energy of the SunEarth systemarrow_forwardSuppose that you want to build a tower out of bricks. Suppose that each brick has a mass of 0.5 kg and is 0.1 m tall. You want the tower to be 20 bricks high, and we want to calculate how much energy is required to build it. The physics fact that you need is this: the energy, E (in Joules) required to lift a mass m (in kg) a height h (in m) is E = mgh (where g is the acceleration due to gravity - for this problem, you can take g to be 10 m/s2.) 1. We will assume that no energy is required to place the first brick in the tower, since it is already on the ground. What about the second brick? How high must if be lifted to be placed on top of the first brick? How much energy does that require? What about the third brick? The tenth brick?arrow_forwardANALYSIS II Data Set 2. Imagine the following experiment: A cart is initially at rest. A force pulls the cart through a given distance and gives it an amount of kinetic energy K. At the end of this distance, the force goes to zero and the cart travels with a constant speed. The resulting speed is measured. The data table on the next page shows the measured kinetic energies and the measured speeds. K, Jv, m/s 0.50 0.48 1.50 0.76 3.00 1.10 4.50 1.30 6.00 1.55 7.50 1.70arrow_forward
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