Motion in a Straight Line Test

Result

Motion in a Straight Line Test - 38

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Weekly Quiz Competition

Question 1
4 / -1

A stone dropped from the top of the tower touches the ground in 4 sec. The height of the tower is about

A
80 m

B
40 m

C
20 m

D
160 m

Solution
Question 2
4 / -1

Two balls are dropped to the ground from different heights. One ball is dropped 2 s after the other but they both strike the ground at the same time. If the first ball takes 5 s to reach the ground, then the difference in initial height is (g = 10 ms^–2)

A
20 m

B
80 m

C
170 m

D
40 m

Solution
Question 3
4 / -1

A frictionless wire AB id fixed on a sphere of radius R. A very small spherical ball slips on this wire. The time taken by this ball to slip from A to B is

A

B

C

D

Solution
Question 4
4 / -1

From a balloon rising vertically upwards at 5 m/s a stone is thrown up at 10 m/s relative to the balloon. Its velocity with respect to ground after 2 s is

A
0

B
20 m/s

C
10 m/s

D
5 m/s

Solution
Question 5
4 / -1

A stone thrown upward with a speed u fro the top of the tower reaches the ground with a velocity 3u. The height of the tower is

A

B

C

D

Solution
Question 6
4 / -1

A ball is thrown vertically upwards with a velocity of 25 ms^–1 from the top of a tower of height 30 m. How long will it travel before it hits ground?

A
6 s

B
5 s

C
4 s

D
12 s

Solution
Question 7
4 / -1

An object start sliding on a frictionless inclined plane and from same height another object start falling freely

A
Both will reach with same speed

B
Both will reach with same acceleration

C
Both will reach in same time

D
None of the above
Question 8
4 / -1

From the top of a tower 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 higher stone hits the ground with a higher speed

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

D
The speed can't be determined with the given data
Question 9
4 / -1

Three particles A, B and C are thrown from the top of a tower with the same speed. A is thrown up, B is thrown down and C is horizontally. They hit the ground with speeds V_A, V_B and V_C respectively

A
V_A = V_B = V_C

B
V_A = V_B > V_C

C
V_A > V_B > V_C

D
V_A > V_B = V_C
Question 10
4 / -1

A ball is thrown vertically upwards from the top of a tower at 4.9 ms^–1. It strikes the pond near the base of the tower after 3 sec. The height of the tower is

A
73.5 m

B
44.1 m

C
29.4 m

D
None of these

Solution