(II) A 0.280-kg croquet ball makes an elastic head-on collision with a second ball initially at rest. The second ball moves off
with half the original speed of the first ball. (a) What is the mass of the second ball? (b) What fraction of the original kinetic energy ( KE/KE) gets transferred to the second ball?
1 answer:
You might be interested in
Correct Answer:
3.1375
Explanation:
Use equation Δ
to find
Plug in all variables
Answer: 3.1375
1) C. velocity
Acceleration is defined as the rate of change of velocity per unit time. In formulas:
where
is the change in velocity
is the time interval
Therefore, the correct answer is C. velocity.
2) A. 9.8m/s/s
Earth's gravity is a force, so it produces an acceleration on every object with mass located on the Earth's surface. This acceleration can be calculated, as it is given by the formula
where
is the gravitational constant
is the Earth's mass
is the Earth's radius
By substituting these numbers into the formula, one can find that the acceleration due to Earth's gravity is .