Explanation:
The initial kinetic energy is
The final kinetic energy is
The work done W on the car is
The power expended P is
Answer:
Acceleration,
Explanation:
It is given that, two isolated protons are separated by 2 nm. The force due to charged particles is given by :
Force due to mass of proton,
So, the acceleration of two isolated protons is . Hence, this is the required solution.
To calculate the horizontal velocity component, use the cosine identity. where cos A = a / h
where A is the angle the golfer hits the ball
a is the horizontal component velocity
h is the speed the golfer hits the ball
so a = h cos A
a = 31 cos 35
a = 25.4 m/s
Answer:
See in explanation
Explanation:
Scientific use: The Einstein's THEORY of relativity states that "Time Is Absolute".
Everyday use: Einstein's LAW of relativity says that time is not the same at all places and events.
Answer:
5.4 J.
Explanation:
Given,
mass of the object, m = 2 Kg
initial speed, u = 5 m/s
mass of another object,m' = 3 kg
initial speed of another orbit,u' = 2 m/s
KE lost after collusion = ?
Final velocity of the system
Using conservation of momentum
m u + m'u' = (m + m') V
2 x 5 + 3 x 2 = ( 2 + 3 )V
16 = 5 V
V = 3.2 m/s
Initial KE =
=
= 31 J
Final KE =
Loss in KE = 31 J - 25.6 J = 5.4 J.