Question

A projectile is projected from the ground passes through points (4,5)m and (5,4)m during its motion . The range of the projectile is...

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Answer 1

Answer:

Correct option is

B

m

Be equation of trajectory (y=xtan[y=xtanα[1−

R

x

]]

4=3tanα[1−

R

3

] ...(i)

3=4tanα[1−

R

4

] ...(ii)

dividing (i) & (ii)

3

4

=

4

3

1−

R

4

[1−

R

3

]

⇒16[1−

R

4

]=9[1−

R

3

]

7=

R

64

−

R

27

⇒R= 61 upon 9

Answer 2

Answer:

Be equation of trajectory (y=xtan[y=xtanα[1−

R

x

]]

4=3tanα[1−

R

3

] ...(i)

3=4tanα[1−

R

4

] ...(ii)

dividing (i) & (ii)

3

4

=

4

3

1−

R

4

[1−

R

3

]

⇒16[1−

R

4

]=9[1−

R

3

]

7=

R

64

−

R

27

⇒R=

7

37