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.
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Answer:
potential energy is the ability to do work
Answer
given,
angular speed of disk = 32 rad/s
mass dropped, m = 1.3 Kg
radius, r = 0.25 m
new rotational velocity = ?
now,
Initial rotational inertia of the disk
Assuming the mass and the radius of the disk is equal to 7.5 Kg and 0.85 m respectively
now,
Rotational inertia after mass is dropped on it
using angular momentum conservation
I₁ω₁ = I₂ω₂
2.71 x 32 = 2.79 x ω₂
ω₂ = 31 rad/s
new angular velocity of the disk is ω₂ = 31 rad/s
According to the particle theory, the third theory is that if heated,the particles move faster and then the kinetic energy increases.I think your question relates to fluid friction and it will only increase when an object increases in which will cause it to come intact with more particles.The faster the object moves- The more particles.The greater the attraction between particles or molecules, then the greater the resistance of the molecules to flow past one another.Hope that helped !