At a distance of 4,000 ft from the launch site, a spectator is observing a rocket being launched. If the rocket lifts off vertically and is rising at a speed of 600 ft/sec when it is at an altitude of 3,000 ft, how fast is the distance between the rocket and the spectator changing at that instant?

3 years ago


Answers : (2)


distance=s=√(40002+h2), rate of change of distance=ds/dt=(ds/dh)(dh/dt)=(d(√(40002+h2)/dh)(dh/dt),dh/dt=600 ft/sec

3 years ago

250/3 ft/sec using 2d figure

one year ago

Post Your Answer

More Questions On IIT JEE Entrance Exam

Ask Experts

Have any Question? Ask Experts
Post Question
Answer ‘n’ Earn
Attractive Gift
To Win!!!
Click Here for details
Definite integration
The answer is 1.09861228866.
noneool 2 months ago
The answer is 1.09861228866.
noneool 2 months ago
ya, But how to solve it?
Nihal Raj 2 months ago
Does someone know the real story behind IIT JEE paper leak in 1997?
In 1997, IIT JEE was cancelled for the first time. The story is that a private coaching institute in Lucknow called its students 12 hours before the Physics and Chemistry exams for...
Ambar Kumar 9 days ago
A block is resting on a horizontal plate in the xy plane and the coefficient of friction between block and plate is μ. The plate begins to move with velocity v = bt 2 in x -direction. At...
Hi yash! as the plate begins to move frictional force acts on the block along the direction of velocity to prevent relative motion. when the force exceed the maximum static friction the...
PRATYUSH MISHRA 2 months ago
no not yet yash I am a student of class 11
PRATYUSH MISHRA 2 months ago
are you studying in an iit
yash 2 months ago
what is iit preparatory course. is iitk can be a better option
Hi One year preparatory course for SC/ST candidates is offered to improve their intake in the B.Tech programme. Generally 30 to 40 candidates from the non-qualified candidates list in the...
AskiitianExpert Shine 5 years ago
did they announce for 2012?
tanya sinha 2 years ago
suggest books for practice questions
“suggest books for practice questions“ which book you are talking about.Please be specific while posting your answer.Please specify the class which you are in.Wether competitve...
Sunil Kumar FP 3 months ago
who was the first prime minister of india??
First PM of India was Pandit Jawaharlal Nehru. He was the first Prime Minister before independence and was the Prime Minister from 1947 till his death in 1962.
disha 20 5 years ago
View all Questions »