Question

a particle is projected from the surface of the earth with a speed of 20 metre per second at an angle 30 degree with the horizontal determine the horizontal range​

Answer 1

Answer:

yes

Explanation:

A. assets for the period will be overstated

B. liabilities for the period will be understated

C. expenses for the period will be overstated

D. owner's equity for the period will be understated

Answer 2

Answer:

Correct option is

B

40

3

m

Given that,

Speed u=20m/s

Angle θ=30

0

Height h=40m

Now, along y axis

u

y

=usin30

0

u

y

=20×

2

1

u

y

=10m/s

Now, we know that

a=−10m/s

2

s=−40m

Now, from equation of motion

s=u

y

t−

2

1

gt

2

−40=10t−5t

2

5t

2

−10t−40=0

t

2

−2t−8=0

t

2

−(4−2)t−8=0

t(t−4)+2(t−4)=0

(t+2)(t−4)

Now, neglect of negative value

So, t=4s

Now, the range is

R=ucos30

0

×t

R=20×

2

3

×4

R=40

3

m

Hence, the range is 40

3

m

Explanation:

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