Elements are made up of the same type of atom and are classified by the number of protons they contain.
Graphs are used to show how fast it goes and how long it takes
Answer:
power is the rate at which energy is transferred or converted
the unit of power is Watts
The speed of the vehicle after the push is 2.7 m/s.
<h3>What is velocity?</h3>
velocity is the rate of change of displacement.
To calculate the velocity of the vehicle, we use the formula below.
Formula:
- v = √[2(W-W')/m]............... Equation 1
Where:
- W = work done by the pusher
- W' = Work done by friction
- m = mass of the car
From the question,
Given:
- W = 6500 J
- W' = 2000 J
- m = 1200 kg
Substitute these values into equation 1
- v = √[2(6500-2000)/1200]
- v = √(7.5)
- v = 2.7 m/s
Hence, the speed of the vehicle after the push is 2.7 m/s.
Learn more about velocity here:
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1.8N
Explanation:
Given parameters:
Mass of the hockey puck = 0.15kg
Acceleration = 12m/s²
Unknown:
Net force = ?
Solution:
According newton's second law of motion "the net force on a body is the product of its mass and acceleration".
Force = mass x acceleration
Input the variables;
Net force = 0.15 x 12 = 1.8N
learn more:
Newton's law of motion brainly.com/question/11411375
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