Question

u=0km/hr
v=100km/hr
t=10min
m=1000kg
f=?​

Answer 1

Formulas:

f = m×a

a = (v-u)/t

Solving:

f = m×a

= 100 × a

so, we have to find "a"

a = (v-u)/t

as "v" and "u" are in kmph, we have to convert them to m/s

even t is in minutes, so we have to convert it into seconds

u = 0 × 5/18 = 0m/s

v = 100 × 5/18 = 27.77...m/s

t = 60 × 10 = 600 seconds

a = (v-u)/t = (27.77-0)/600 = 0.04629...m/s

f = m×a = 1000 × 0.04629... = 46.29 N

Final Answer : 46.29 N

Answer 2

Given -

• Initial Velocity, u = 0 km/hr
• final Velocity, v = 100 km/hr = 27.78 m/s
• Time period, t = 10 min = 600 seconds
• mass,m = 1000 kg

To Find -

→ force generated

Solution -

$\underline { \sf Formula}$

$\boxed{v - u = at}$

$\implies a = \frac{v - u}{t}$

where a = acceleration

$a = \frac{27.78 - 0}{600}$

$a = \frac{27.78}{600}$

$a = 0.046m/{s}^{2}$

$\boxed{\sf Force,f = mass \times acceleration}$

f = 1000 $\times$ 0.046

f = 46 N

Note-

• Conversion of units into proper SI unit is necessary.

• SI unit of force is Newton(denoted by "N")