Question

pls solve this...... its urgent.....​

Answer 1

Answer:

Using v² = u² + 2aS,

Here: v = 0 (stoppage)

u = 7 m/s

a = ?

S = 10m

So, 0 = 49 + 2a(10)

Or, a = -49/20 m/s² = -2.45 m/s²

Since the retardation is 2.45m/s², using F = ma, the resistance due to braking shall be F(r) = m(2.45), where m is the mass of the car.