Answer:

Explanation:
It says “Momentum before the collision is equal to momentum after the collision.” Elastic Collision formula is applied to calculate the mass or velocity of the elastic bodies.












Answer:
The stars at the center bulge are bigger and brighter than the stars in the arms.
Explanation:
More energy is being used in the movement
Answer:
1.58 Hz
Explanation:
The frequency of the simple pendulum is given by
f = 1/T
= 1/2π√g/l
In this problem, I = 10.0 cm = 0.1 m
f = 1/2π√9.8/0.1
= 1.58 Hz
Answer:

towards right so it is -15 degree
Explanation:
Net force in forward direction due to all three is given as

here we know that





Similarly in Y direction we will have



Now the net force on the donkey is given as



Now direction of force is given as


towards right so it is -15 degree