The speedometer readings of a car are shown below. Find the acceleration
of the car and its displacement
Answers
Answered by
2
Time = t= 9.45 -9.25=20min= 20x60 seconds
Initial velocity = 36km/h = 36x 5/18=10 m/s
Final velocity = V= 72km/h=72x 5/18=20m/s
Acceleration= a=V-u/t
=20-10/20x60
=10/20x60
=1/120
=0.008m/s2
THEREFORE acceleration of the car is 0.008m/s2
From Second equation of motion:
V^2-u^2=2as
S=V^2-u^2/2a
S=(20×20)-(10×10)/2*0.008
S=(400_100)/2*0.008
=300/2×0.008 =150/0.008 =150*1000/8 =18.75x 1000 =1875000/100=18750m Magnitude of displacement is 18750m
Similar questions