badge image

Enroll For Free Now & Improve Your Performance.

×
User Icon
User Icon
User Icon
User Icon
User Icon

Thank you for registering.

One of our academic counsellors will contact you within 1 working day.

Please check your email for login details.
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: 12

                        

8. An object A is kept fixed at the point x = 3 m and y = 1.25 m on a plank P raised above the ground. At time t = 0 the plank starts moving along the + x direction with an acceleration 1.5 m/s2. At the same instant a stone is projected from the origin with a velocity vector u as shown. A stationary person on the ground observes the stone hitting the object during its downward motion at an angle of 45o to the horizontal. All the motions are in X-Y plane. Find vector u and the time after which the stone hits the object. Take g = 10 m/s2.

9 years ago

Answers : (3)

aku -- kumar
38 Points
							

dear student,

 

solving on the pc is not possible you can buy arihant books to see the solutions or go to resonance website and place a order for rank master there you'll get the solutions.........its price is Rs.750, or check some old books from your seniors 

9 years ago
bhanuveer danduboyina
95 Points
							

It is a big question but the answer is rather easy

9 years ago
aku -- kumar
38 Points
							

see rel vel of ball w.r.t trolley,

 

v(rel)=vcosψ i+ v sinψ j -(root{3}-1)j

 

say if some φ anghle is made by this vector 

so tan φ = v sinψ - ( root3-1)/vcosψ.    ........(1)

as the ball hits the trolley so the relative velocity is towards trolley; as a result the angle made by vel vector of ball w.r.t trolley is 45 with +ve X-axis

 

if ψ=4Θ/3, keep this value in(1). at t=0 & φ= 45  solve the equation and get the value of v which is 2m/s at 60 degree to X-axis

 

9 years ago
Think You Can Provide A Better Answer ?
Answer & Earn Cool Goodies


Course Features

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


Course Features

  • 18 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