MY CART (5)

Use Coupon: CART20 and get 20% off on all online Study Material

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: Rs.

There are no items in this cart.
Continue Shopping
Menu
Grade: 9
        
A tennis player returns,with his rackets,a tennis ball of mass 100g coming towards him with a speed of 162 kmh1.If the ball returns with the same speed of and it remains in contact with racket for 0.1s Find the force exerted by him on the ball.Also explain why force is negative.
one year ago

Answers : (1)

Khimraj
3007 Points
							
force = dp/dt
m = 0.1 kg
v = 162*5/18 = 45 m/s
then dp = mv – (-mv) = 2mv = 2*0.1*45 = 9
and dt = 0.1
so F = 9/0.1 = 90 N
Hope it clears.
one year ago
Think You Can Provide A Better Answer ?
Answer & Earn Cool Goodies


Course Features

  • 728 Video Lectures
  • Revision Notes
  • Previous Year Papers
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Test paper with Video Solution


Course Features

  • 731 Video Lectures
  • Revision Notes
  • Test paper with Video Solution
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Previous Year Exam Questions


Ask Experts

Have any Question? Ask Experts

Post Question

 
 
Answer ‘n’ Earn
Attractive Gift
Vouchers
To Win!!! Click Here for details