Since the ball is at rest, it has no kinetic energy and thus the total mechanical energy of the ball is also 4.9 J. If the ball moves downhill, some gravitational potential energy gets transformed to kinetic energy. At point B, the gravitational potential energy decreases. GPE = }mgh = ¿(0.1 kg)(9.8) (8 m) = 3.92 J 10m 8m 4m But since the total mechanical energy is a constant, the kinetic energy of the ball is TKE = PE + KE 4.9 J = 3.92 J + KE KE = 0.98 ) Sources: https://tinyurl.com/vdmasfwc and https://tinyurl.com/2dcbxabf Learning Task 2: Using the same diagram and situation, determine the gravitational potential and kinetic energy of the ball at point C and on the ground (h=0). Write your answers on the table below. Gravitational Potential Energy Kinetic Energy Point C Ground KASY
Since the ball is at rest, it has no kinetic energy and thus the total mechanical energy of the ball is also 4.9 J. If the ball moves downhill, some gravitational potential energy gets transformed to kinetic energy. At point B, the gravitational potential energy decreases. GPE = }mgh = ¿(0.1 kg)(9.8) (8 m) = 3.92 J 10m 8m 4m But since the total mechanical energy is a constant, the kinetic energy of the ball is TKE = PE + KE 4.9 J = 3.92 J + KE KE = 0.98 ) Sources: https://tinyurl.com/vdmasfwc and https://tinyurl.com/2dcbxabf Learning Task 2: Using the same diagram and situation, determine the gravitational potential and kinetic energy of the ball at point C and on the ground (h=0). Write your answers on the table below. Gravitational Potential Energy Kinetic Energy Point C Ground KASY
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Answer Learning Task 2 see the diagram above the learning task 2
Transcribed Image Text:E. Engagement (Time Frame: Day 3)
The gravitational potential energy of an object is determined by this equation:
GPE = mgh
where m is the mass of the object, gis acceleration due to gravity (9.8) and h is the height or elevation of the object. The
kinetic energy of an object in motion is determined by the formula
KE = mv²
where m is the mass of the object and v is its velocity.
Consider the figure on the left. If the ball has a mass of 0.1 kg, the gravitational potential
energy it contains is
A.
GPE = mgh =(0.1 kg)(9.8) (10 m) = 4.9 J
Since the ball is at rest, it has no kinetic energy and thus the total mechanical energy of
the ball is also 4.9 J. If the ball moves downhill, some gravitational potential energy gets
transformed to kinetic energy. At point B, the gravitational potential energy decreases.
GPE = mgh =(0.1 kg)(9.8) (8 m) = 3.92 J
10m
8m
4m
But since the total mechanical energy is a constant, the kinetic energy of the ball is
TKE = PE + KE
Sources: https://tinyurl.com/vdmasfwc and
https://tinyurl.com/2dcbxabf
4.9 J = 3.92 J + KE
KE = 0.98 J
Learning Task 2:
Using the same diagram and situation, determine the gravitational potential and kinetic energy of the ball at point C and
on the ground (h=D). Write your answers on the table below.
CLE
Point
Gravitational Potential Energy
Kinetic Energy
Ground
ASY
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