Question

a car which have a mass of 100kg accelerates from 30km/h to 60km/h in 5min. find the force acting on it

Answer 1

Hi,mate!!

Here is your answer.

✴✴✴✴✴✴✴✴✴✴✴✴✴✴

☑ mass, m = 100kg

☑ The uniform velocity, u = 30km\h = 500 m\s

☑ The last velocity, v = 60km\h = 1000m\s

☑ Time , t = 5 min = 300s

✏ Acceleration, a = ( v - u )\t
= (1000-500) \ 300
= 500 \ 300
= (5\3) m\s²

✒ Force, f = ma = 100 × (5\3) = 166.67 N

✴ Hope it will help you friend...

Answer 2

first of all,
changing km/h to m/s
30 km / h = 30 × 5 / 18= 150 / 18 m/s
60 km / h = 60 x 5 / 18 = 300 / 18 m/s

acceleration =change in velocity / time taken
$\frac{ \frac{300}{18} - \frac{150}{18} }{5 \times 60} \\ \frac{ \frac{150}{18} }{300} \\ \frac{1}{36} m {s}^{ - 2}$
force = mass × acceleration
100 x 1 / 36

≈2.778 Newtons.

Plz Mark It As Brainliest Answer.