Question

Please do 13th question
Its urgent
Tomorrow will my exam
Please help me

Answer 1

$<b><i><u>$

$\huge \mathfrak{Answer: }$

Given,

m = 2 kg

t = 10 sec

u = 5m/s

v = 10m/s

We know that,

force = mass × acceleration

Finding acceleration

$(v \: - u) \div t \\ = (10 - 5) \div 10 \\ = 5 \div 10 \\ = 0.5ms {}^{ - 2}$

Now, calculating force

$f = m \times a \\ f = 2 \times 0.5 \\ f = 1 \: newton$

Hence, the magnitude of force is 1N.

________________________________

We know that -

$v = u + at$

Here, force is applied for 15 seconds.

So, Velocity :

$v = 5 + 0.5 \times 15 \\ v = 5 + 7.5 \\ v = 12.5 \: ms {}^{ - 1}$

Hope it helps