Question

A ball projected with initial speed 202 m/s at
angle 45°. What will be speed when it makes 30°
with horizontal ?

Answer 1

Explanation:

Correct option is

A

10

5

m/s

average velocity is given by

time

displacement

displacement till highest point will be (

2

R

,H) in horizontal and vertical direction respectively.

As given V=20

2

, θ=45

then H=

2g

V

2

sin

2

θ

, R=

g

V

2

sin2θ

,

time=

g

Vsinθ

H=20m,

2

R

=40m,T=2

average velocity =

2

20

2

+40

2

=10

5

m/s

so option A is correct.

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Answer 2

Answer:

Correct option is

A

10

5

m/s

average velocity is given by

time

displacement

displacement till highest point will be (

2

R

,H) in horizontal and vertical direction respectively.

As given V=20

2

, θ=45

then H=

2g

V

2

sin

2

θ

, R=

g

V

2

sin2θ

,

time=

g

Vsinθ

H=20m,

2

R

=40m,T=2

average velocity =

2

20

2

+40

2

=10

5

m/s

so option A is correct.

Explanation:

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