Answer:
255150 J
364.50233 m
Explanation:
f = Frictional force = 700 N
m = Mass of truck = 2268 kg
t = Time taken
u = Initial velocity
v = Final velocity
s = Displacement
a = Acceleration
The kinetic energy is given by

The initial kinetic energy of the truck is 255150 J
Acceleration is given by

From equation of motion

The stopping distance of the truck is 364.50233 m
Cause of the graventation rings around earth it keeps the moon from going anywhere
Answer:
vi = 5.25 m/s
Explanation:
We can determine the initial velocity of the runner by using the first equation of motion, as follows:

where,
vf = final speed of the runner = 4 m/s
vi = initial speed of the runner = ?
a = deceleration of the runner = - 0.25 m/s²
t = time taken = 5 s
Therefore,

<u>vi = 5.25 m/s</u>
Answer:
Explanation:
Given
Electrostatic force between two electrons is equal to weight of one electron
i.e.

where
are the charge of particles
mass of electron
r=distance between them
