Motion in a Plane Test

Result

Motion in a Plane Test - 23

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Weekly Quiz Competition

Question 1
4 / -1

A ball is released from the top of a tower of height h metres. It takes T seconds to reach the ground what is the position of the ball in T/3 seconds?

A
h/9 metres from the ground

B
7h/9 metres from the ground

C
8h/9 metres from the ground

D
17h/18 metres from the ground

Solution
Question 2
4 / -1

A parachutist after bailing out falls 50 m without friction. When parachute opens, it decelerates at 2m/s². He reaches the ground with a speed of 3 m/s. At what height, did he bail out?

A
111 m

B
293 m

C
182 m

D
91 m

Solution
Question 3
4 / -1

A bullet fired into a fixed target loses half of its velocity after penetrating 3 cm. How much further it will penetrate before coming to rest assuming that it faces constant resistance to motion?

A
1.0 cm

B
1.5 cm

C
2.0 cm

D
3.0 cm

Solution
Question 4
4 / -1

A body of mass m is accelerated uniformly from rest to a speed υ in a time T. The instantaneous power delivered to the body as a function of time is given by

A

B

C

D

Solution
Question 5
4 / -1

When a ball is thrown up vertically with velocity ν_o it reaches a maximum height of h. if one wishes to triple the maximum height then the ball should be thrown with velocity

A

B

C

D

Solution
Question 6
4 / -1

From the top of a tower if two stones, whose masses are in the ratio 1:2 are thrown one straight up with an initial speed u and the second straight down with the same speed u. then neglecting air resistance

A
the heavier stone hits the ground with a higher speed

B
The lighter stone hits the ground with a higher speed

C
Both the stones will have the same speed when they hit the ground

D
The speed cannot be determined with the given data
Question 7
4 / -1

From the top of tower, a stone is thrown up. It reaches the ground in t1s. A second stone thrown down with the same speed reaches the ground in t2s. A third stone released from rest reaches the ground in t₃s. Then

A

B

C

D

Solution
Question 8
4 / -1

The given graph shows the variation of velocity with displacement. Which one of the graph given below correctly represents the variation of acceleration with displacement ?

A

B

C

D

Solution
Question 9
4 / -1

Three persons P, Q, and R of same mass travel with same speed u along an equilateral triangle of side ‘d’ such that each one faces the other always. After how much time will they meet each other

A
d / u seconds

B
2d/3u seconds

C
2d/(√3)u seconds

D
d/(√3)u seconds

Solution
Question 10
4 / -1

Four persons K, L, M, and N are initially at the corners of a square of side of length d. If every person starts moving with the same speed υ such that K is always headed towards L, L towards M, M is headed directly towards N and N towards K, then the four persons will meet after

A
d/ν seconds

B

C

D
2dν seconds

Solution