Answer:
29 m
Explanation:
given,
speed of the car = 73 Km/hr
= 73 x 0.278 m/s = 20.3 m/s
Time elapses before the motorcycle is moving as fast as the car
using equation of motion
v = u + at
initial speed = 0 m/s
20.3= 0 + 7 x t
t = 2.9 s
b) distance traveled by the car in that time
d = s x t
d = 20.3 x 2.9 = 58.87 m
distance traveled by the police
s = 29.435 m
distance car is ahead = 58.57 - 29.44 = 29.13
= 29 m
Answer:
0.014s
Explanation:
Given parameters:
mass of golf ball = 0.059kg
force applied = 290N
velocity = 69m/s
initial velocity = 0m/s
Unknown:
Time of contact = ?
Solution;
We know that momentum is the quantity of motion of body possess;
Momentum = mass x velocity
Momentum = 0.059 x 69 = 4.1kgm/s
Also; impulse is the effect of the force acting on a body;
impulse = force x time = momentum
So;
Force x time = momentum
Time = =
= 0.014s