A ball A of mass .202 kg is moving at a velocity of 2.0 m/s toward a ball B that is at rest.
(a) Calculate the initial momentum for Ball A and Ball B.
(b) Calculate initial Kinetic energy for Ball A and Ball B.
My doubt since its asking for initial moment only, can I simply calculate each separately? The collision hasn't occurred yet.
p = mv for each (B is zero)
KE = 1/2 mv^2 (again B is zero)
Yes, you can calculate the initial momentum and kinetic energy for each ball separately since the collision has not yet occurred. Here's how you can calculate the initial momentum and kinetic energy for both balls:
(a) To calculate the initial momentum for ball A, you can use the formula:
Momentum = mass × velocity
Given that the mass of ball A is 0.202 kg and its velocity is 2.0 m/s, you can plug these values into the formula to find the initial momentum of ball A.
Momentum of ball A = 0.202 kg × 2.0 m/s
Similarly, for ball B, since it is at rest, its initial momentum is equal to zero.
(b) To calculate the initial kinetic energy for each ball, you can use the formula:
Kinetic energy = (1/2) × mass × velocity^2
For ball A, you can use the same values as before, i.e., mass = 0.202 kg and velocity = 2.0 m/s, and plug them into the formula to find the initial kinetic energy of ball A.
Kinetic Energy of ball A = (1/2) × 0.202 kg × (2.0 m/s)^2
For ball B, since it is at rest, its initial kinetic energy is also equal to zero.
Remember, these calculations are for the initial momentum and kinetic energy of each ball separately, before any collision has occurred.