Name:Per:
PT HW 3.1
(linear) Kinetic Energy and Wor
1.a. A bicycler has a mass of 80. kg. He pedals the bike 100 min 20 seconds. What is
his kinetic energy (KE;)?
Given, Unknown:
Equation, Substitute:
Solution:
1.b. The bicycler (still 80.kg of mass) doubled his speed to 200m in 20 seconds, What
his new kinetic energy (KE)? What is the ratio of KE; and KE?
Given, Unknown:
Solution
Equation, Substitute:
1.c. The bicycler doubled his speed. What happened to his KE?
2.a. Car A has a mass of 250. kg. It's engine accelerates it from 0.0 to 20. m/s in 6.0
ndo (a) what is the car's acceleration in m s?
tio hstitute:
Solution:
Answers
Answer:
1.a) 1 kJ
1.b) 4 kJ
ratio 1:4
1.c) 4 times as before
2.a) 3.33 m/s2
Explanation:
1.a) bicycle's velocity =Displacement/time
=100/20 m/s
=5 m/s
bicycler's KE =1/2 *mass*(velocity)^2
=1/2*80*5^2
=1000 J = 1 kJ
1.b) bicycle's new velocity =200/20 m/s
=10 m/s
bicycler's new KE =1/2*80*10^2
=4000 J = 4 kJ
Ratio= KE 1 :KE new
= 1 :4
1.c) when bicycler's speed was doubled it increased the KE by 4 times (2^2). because In KE we consider the square of the speed , so the factor we increase the speed , the KE will get increased with the square value of it
ex : speed is triple the prior value , then the KE is as 3^2 times as before. that is 9 times
2.a) car acceleration = (20-0)/6 m/s2
= 3.33 m/s2
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Plug
Battery
Light
PLZ HELP THIS IS DUE TODAY!!
Answers
Answer:
First, you need to charge the battery.
You do this by connecting the device to the electricity, in this way you can store the energy, that comes in form of electric energy, in the battery, that stores the energy in form of chemical energy.
When you push the "ON" button, the energy stored in the battery starts to run in the device, in form of electrical energy, in this way it reaches all the components and the computer is fully turned on.
At this moment the Chromebook turns on its screen, producing luminous energy (so consumes the electric energy that comes from the battery, and turns it into luminous energy).
There are other transformations, for example, in the cooler (the small fan inside the device) there is a transformation from electrical energy to mechanical energy (because the fan is rotating now).
Answers
Answers
Answers
Answer:
Explanation:
The gravitational field strength at a point is the gravitational force exerted per unit mass placed at that point. This means that the gravitational field strength, g {\displaystyle g} is equal to the force experienced by a mass of 1 kg in that gravitational field.
Answers
Answer:
The kinetic energy of the train at top speed is 5,400,000 J
Explanation:
Kinetic Energy
It's the capacity that an object has to do work in virtue of its velocity. If we use UI units for the mass and velocity, the kinetic energy is expressed in Joules, or Nw.m or . It can be computed with the formula
The roller coaster train has a mass of 12,000 kg and a velocity of 30 m/s. Replacing those values in the formula, we have:
Answer: the first answer is 5,400,000 the second one is 46
Explanation: hope it helps : ]