Question

4. If a net force of 7 N was constantly applied on 400 g object at rest, how long wil
raise its velocity to 80 m/s?​

Answer 1

Answer:

according to question :-

force = m * a

7 = 400 * a

7= 0.004 kg *a

7/0.004 = a

7000/4 = a

1750 = a

if acceleration = 1750/ sec

then displacement = 1750

so

velocity = displacement / time

80 = 1750 / time

80/1750 = 1/time

1750 /80 = time

21.875 sec = time

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