Motion in a Plane Test

Result

Motion in a Plane Test - 2

Score
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Rank
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TIME Taken - -

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Weekly Quiz Competition

Question 1
1 / -0

The maximum height attained by a projectile is increased by 10% by changing the angle of projection, without changing the speed of projection. The percentage increase in the time of flight will be

A
20%

B
15%

C
10%

D
5%
Question 2
1 / -0

A ball is projected vertically upwards with a certain initial speed. Another ball of the same mass is projected at an angle of 60° with the vertical, with the same initial speed. At the highest point, the ratio of their potential energies will be

A
4 : 1

B
3 : 2

C
2 : 3

D
2 : 1
Question 3
1 / -0

A projectile has a maximum range of 200 m. What is the maximum height attained by it?

A
25 m

B
50 m

C
75 m

D
100 m
Question 4
1 / -0

A projectile has a range R and time of flight T. If the range is doubled (by increasing the speed of projection and without changing the angle of projection), the time of flight will become

A
T/√2

B
√2T

C
T/2

D
2 T
Question 5
1 / -0

Which of the following remains constant during the motion of a projectile fired from a planet?

A
Kinetic energy

B
Momentum

C
Vertical component of velocity

D
Horizontal component of velocity
Question 6
1 / -0

Vector addition is

A
non-commutative

B
intransitive

C
commutative

D
asymmetric

Solution

Vector addition is commutative, just like addition of real numbers. If you start from a point say P, you end up at the same spot no matter which displacement (a or b) you take first. The head-to-tail rule yields vector c for both a + b and b + a.