×

#### Thank you for registering.

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

Click to Chat

1800-1023-196

+91-120-4616500

CART 0

• 0

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
```
Shell is fired from a point O at an angle of 60 degree with the horizontal with speed of 40 metres per second .it strikes the horizontal plane through O at a point A. the gun is fired for second time with the same angle of elevation as before but a different speed V. the target starts to rise vertically upwards from A with a constant speed 9 root 3 metre per second at the same instant as the shell is fired if the shelk strikes the target find V
Shell is fired from a point O at an angle of 60 degree with the horizontal with speed of 40 metres per second .it strikes the horizontal plane through O at a point A. the gun is fired for second time with the same angle of elevation as before but a different speed V. the target starts to rise vertically upwards from A with a constant speed 9 root 3 metre per second at the same instant as the shell is fired if the shelk strikes the target find V

```
4 years ago

Shaswata Biswas
132 Points
```							For the first shot the horizontal distance covered is R = 40^2sin120`÷10 = 80root3 m. For the second shot, let the velocity of projection be V, and it hits the target after t seconds. Then vertical displacement of the shot in time t = veritical displacement of the tarfet in time t. I.e, 9root3.t = Vsin60.t - gt^2÷2 => t = (V-18)root3÷10.And the horizontal displacement of the first shot = the horizontal displacement of te secind shot. I.e, 40^2.sin120÷g = Vcos60.t => V^2-18V-1600 = 0  => V = 50/-32.  So the required velocity is 50 m/s.
```
4 years ago
Think You Can Provide A Better Answer ?

## Other Related Questions on Mechanics

View all Questions »

### Course Features

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

### Course Features

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