Bat Speed कैसे बढ़ाये

Notes कैसे बनाए

Theory कैसे याद करें ?

Class 11 कैसे करें आसान

A 150 g tenins ball coming at a speed of 40m/s is hit straight back by a bat to speed of 60m/s. The magnitude of the average force F on the ball, when it is in contact for 5ms is,

A cricket baal of mass 0.25 kg with speed 10 m/s collides with a bat and returns with same speed with in 0.01 s. The force acted on bat is

A pitcher throws a 0.140 -kg baseball, and it approaches the bat at a speed of 40.0 m/s. The bat does W_(nc)= 70.0J of work on the ball in hitting it. Ignoring air resistance, determine the speed of the ball after the ball leaves the bat and is 25.0 m above the point of impact.

A bat emits ultrasonic waves of frequency 39 kHz and receives and echo 0.2 s later. If the speed of sound in air is 300 m/s and the speed of electro magnetic waves 3 xx 10^(8) m//s then the distance of the bat from the object producing the echo is