Question

Body is moving alpng a straight line at 20 ms undergoes acceleration of 4 ms after 2 sec. Speed will be

Answer 1

Answer:

40 answer

Explanation:

ok its is correct

Answer 2

Explanation:

GIVEN :-

• Initial velocity = 20 m/s.

• Acceleration = 4 m/s².

• Time = 2 seconds.

TO FIND :-

• Final velocy.

SOLUTION :-

★ Here we can solve this question by two methods.

[1]

✭ a = (v - u)/t

a → Acceleration.

v → Final velocity.

t → Time taken.

u → Final velocity.

➳ 4 = (v - 20)/2

➳ 4 × 2 = v - 20

➳ 8 = v - 20

➳ v = 20 + 8

➳ v = 28 m/s.

[2]

✭ v = u + at

a → Acceleration.

v → Final velocity.

t → Time taken.

u → Final velocity.

➳ v = 20 + 4 × 2

➳ v = 24 + 8

➳ v = 28 m/s.

Hence the speed after 2 seconds will be 28 m/s.