Question

Calculate the force required to impart a car a velocity of 30 m/s in 10 s. The mass of the car is 1500 kg

Answer 1

Given:-

Velocity = 30 ms-¹

Time = 10s

mass = 1500 kg

v = u + at

30 = 0 + 10a

a = 30/10

a = 3 ms-²

Now,

F = ma

F = 1500 x 3

F = 4500 N

Answer 2

★ Force Required = 4500 Newtons ★

Step-by-step explanation:

Given:

• Initial Velocity (u) = 0 (since the car starts from rest )
• Final Velocity (v) = 30 m/s
• Time (t) = 10 seconds
• Mass (m) = 1500 kg

To Calculate:

• What is the Force (F) = ?

Formula to be used: Force (F) = mass (m) x acceleration (a)

or F = m(v – u)/t ( since a = v – u/t )

• Substituting the values of m , v , u and t,

$F = \frac{1500(30 - 0)}{10} \\ \\ \implies \: \frac{1500 \times 30}{10} \\ \\ \implies \: \frac{45000}{10} \\ \\ \implies \: 4500 \: N$