If the velocity is constant, Kinetic energy is directly proportional to mass. So as mass increases, kinetic energy also increases. Here, mass of horse is greater than that of dog, so kinetic energy of the horse is greater than dog when speed is constant.
Let the speed = x km/h. Distance = 360km
then time taken = distance/speed
t1=360/x
if speed is increased by 5 km/h
speed will be (x+5)km/h and distance is the same
t2= 360/(x+5)
time with original...
Expression for kinetic energy
Ek= ½ mv2
m = Mass of object
v = Velocity of the object in ms−1
Given that kinetic energy, Ek=25J
(i) If the velocity of an object is doubled, then...
(a) Kinetic energy of an object is defined as the energy possessed by a body by virtue of its motion.
It is given by, K.E = 1/2 mv2
No, the kinetic energy...
Mass of each ball = 0.05 kg
Initial velocity of each ball = 6 m/s
Magnitude of the initial momentum of each ball, pi = 0.3 kg m/s
After collision, the balls change their...
True
In an inelastic collision, the final kinetic energy is always less than the initial kinetic energy of the system. This is because in such collisions, there is always a loss...
(b) the ground on the horse
Explanation:
The horse pushes the ground in the backward direction and, in turn, the ground pushes the horse in the forward direction, according to Newton’s third...
(a) the initial kinetic energy is equal to the final kinetic energy
Explanation:
The initial kinetic energy before the collision and the final kinetic energy after the collision will remain the same....
(b) the final kinetic energy is less than the initial kinetic energy
Explanation:
If the collision is perfectly inelastic the deformation of the bodies during the collision is permanent and the part of...
