Answer:The Earth’s revolution and tilt cause the cycle of the seasons on Earth.
Explanation:
Answer:
Explanation:
= Initial momentum of the pin = 13 kg m/s
= Initial momentum of the ball = 18 kg m/s
= Momentum of the ball after hit
= Angle ball makes with the horizontal after hitting the pin
= Angle the pin makes with the horizotal after getting hit by the ball
Momentum in the x direction
Momentum in the y direction
The pin's resultant velocity is
The pin's resultant direction is below the horizontal or to the right.
Work done in moving a proton = potential difference×Charge of a proton
= 164×1.6×10⁻¹⁹ = 2.624×10⁻¹⁷ J
This work done should be equal to change in kinetic energy.
Initial speed of proton is zero therefore K.E initial will be zero.
Work done = final kinetic energy = 2.624×10⁻¹⁷ J
K.E = mv²/2
v² = 2(2.624×10⁻¹⁷)/1.6×10⁻²⁷ = 3.28×10¹⁰ m/s
∴ v = 1.811×10⁵ m/s
Answer:
mass of the body is constant as it is property of body, but weight is product of acceleration due to gravity and mass, which may vary from place to place because acceleration due to gravity is different for different places.
Answer:
The energy stored in the later case is equal to the energy stored in the former case of the spring.
Explanation:
For a spring we have the expression of kinetic energy as:
where:
k= elastic constant of the spring
x= length of deflection of the spring from the mean position
Here we are given two cases:
CASE:1
x=d
CASE:2
x=-d
So, we get
Just the difference in the two cases is that there is deflection of the spring in the opposite direction.