Motion in a Plane Test

Result

Motion in a Plane Test - 14

Score
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Rank
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TIME Taken - -

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Weekly Quiz Competition

Question 1
4 / -1

A
60 units

B

C
7.5 units

D
zero

Solution
Question 2
4 / -1

A
0

B

C

D

Solution
Question 3
4 / -1

A

B
5

C

D
10

Solution
Question 4
4 / -1

The range of a projectile fired at an angle of 15º is 50 m. If it is fired with the same speed at an angle of 45º. Its range will be

A
25 m

B
50 m

C
100 m

D
77.6

Solution
Question 5
4 / -1

Two projectiles A and B are projected with angle of projection 30^o for the projectile A and 45^o for the projectile B. If R_A and R_B are the horizontal ranges for the two projectiles, then

A
R_A = R_B

B
R_A >R_B

C
R_A < R_B

D
the information is insufficient to decide the relation of R_A and R_B

Solution
Question 6
4 / -1

A projectile is projected at an angle of 15º to the horizontal with some speed υ. If another projectile is projected with the same speed, then it must be projected at what angle with the horizontal so as to have the same range.

A
It is never possible

B
12.5º

C
75º

D
65º

Solution
Question 7
4 / -1

A man has two spheres A and B. He is standing at the top of a tower. He gently drops the sphere A vertically downwards and throws the sphere B horizontally at the same time. Neglecting the air friction, which of the following is the correct statement?

A
Both the spheres will reach the ground exactly simultaneously

B
Sphere A will reach the ground earlier

C
Sphere B will reach the ground earlier

D
The question is incomplete because the masses of the spheres are not given
Question 8
4 / -1

A body is projected horizontally with speed 20 m/s from top of a tower. What will be its speed nearly after 5 sec? Take g = 10 m/s²

A
54 m/s

B
20 m/s

C
50 m/s

D
70 m/s

Solution
Question 9
4 / -1

A projectile thrown at an angle of 45º to the horizontal has a range of 19.6 m. Its velocity at the highest point is (g = 10 m/s²)

A
19.6 m/s

B
5 m/s

C
10 m/s

D
zero

Solution
Question 10
4 / -1

ball is thrown from the ground with a velocity of 20√3 m/s making an angle of 60º with the horizontal. The ball will be at a height of 40 m from the ground after a time t equal to (g = 10 ms^–2)

A
√2 sec

B
√3 sec

C
2 sec

D
3 sec

Solution