Home
Class 9
PHYSICS
(a) The time interval between transmissi...

(a) The time interval between transmission and reception of a signal at radar station is `30 mus`. What is the distance of the intercepting plane from the station ?
(b) Define uniform velocity and uniform acceleration. What are their units ?

Text Solution

Verified by Experts

(a) `t = 40 mu s = 30 xx 10^(-6)s , v = c = 3 xx 10^(8) m//s`
`x = (v xx t)/(2) = (3 xx 10^(8) xx 30 xx 10^(-6))/(2) = 4500 m`
(b) N/A
Promotional Banner

Topper's Solved these Questions

  • MOTION

    PRADEEP|Exercise Formative Assessment 1(b) - Oral testing (Exercise)|1 Videos
  • MOTION

    PRADEEP|Exercise Paper-pen test|15 Videos
  • MOTION

    PRADEEP|Exercise Worksheet testing|16 Videos
  • GRAVITATION

    PRADEEP|Exercise Model Test paper (1)|36 Videos
  • SOUND

    PRADEEP|Exercise Model Test (sec - B)|12 Videos

Similar Questions

Explore conceptually related problems

What parameter can be determined from velocity-time graph of uniform motion?

What is the relation between displacement, time and acceleration in case of a body having uniform acceleration

During an experiment, a signal from a spaceship reahced the ground station in five minutes. What was the distance of the speceship from the ground station ? The signal travels at the speed of light, that is, 3 xx 10^(8) m//s .

The velocity time graph of a uniform motion of a partcile along a st. line id shown in Fig. 2 (a).20. What is the dispacement of the particle in time interval 8 s to 12 s ? .

Two cars cover the distance between two stations in 2 hours. The first car covers the first half of the distance at 20 kmph and the second half at 60 kmph and the second car covers the distance with uniform acceleration, starting with a velocity of 10 kmph.At what instant/instants will the two cars have the same velocity ?

Two stations A and B are 100km apart. A passenger train crosses station A travelling at a speed of 50 km//hr . The train maintains constant speed for 1 hour 48 minute and then the driven applies brakes to stop the train at station B in next 6 minute. Another express train starts from station B at the time the passenger train was crossing station A. The driver of the express train runs the train with uniform acceleration to attain a peak speed v_(0) . Immediately after the train attains the peak speed v_(0) , he applies breaks which cause the train to stop at station A at the same time the passenger train stops at B. Brakes in both the trains cause uniform retardation of same magnitude. Find the travel time of two trains and v_(0) .

A simple pendulum is hung in a stationary lift and its periodic time is T. What will be the effect on its periodic time T if (i) the lift is moving up with a uniform velocity v, (ii) the lift is moving up with a uniform acceleration a, and (iii) the lift is moving down with a uniform acceleration a?

Two cars cover the distance between two station in 2 hours. The first car covers the first half of the distance at 20 km ph and the seconds half at 60 km ph and the second car covers the distance with uniform acceleration, starting with a velocity of 10 km ph. At what instant/instants will the two cars have the same velocity ?