Consider a snooker ball, with a mass of 0.07kg, rolling along a table at a speed of 4.1m/s. it hits a side cushion of the snooker table in a head-on elastic collision. if the ball and cushion are in contact for 72 milliseconds, what is the size of the net force applied to the ball during this collision, in newtons?

Explanation:

From Newton's law of motion, Force is equal to rate of change of momentum.

The initial velocity of the ball, u = 4.1 m/s

mass of the ball, m = 0.07 kg

During contact, velocity = 0

Time of contact, t = 72 ms = 72 × 10⁻³ s

Thus, net force applied to the ball during this collision is

260 miles per hour

explanation:

if the thermos has a vacuum innner, then heat through conv currents and conduction are reduced = vacuum flask