ICSE Class 9 Answered
A car of mass 800kg moving at 54 kmh-1
is brought to rest over a
distance of 15m. Find retarding force developed by brakes of car.
Asked by aryan2mumbai | 01 Sep, 2020, 07:49: PM
Expert Answer
m = 800 kg
u = 54 km/h = 15 m/s
v = 0
s = 15 m
By third equation of motion,
v2 = u2 + 2as
0 = 152 + 2 a x 15
-225 = 30 a
a = 225/30 = -7.5 m/s2
F = ma = 800 x (-7.5) = -6000 N
negative sign indicates that the force is retarding due to applying brakes.
Answered by Shiwani Sawant | 01 Sep, 2020, 11:20: PM
Application Videos
Concept Videos
-
Newton's First Law of Motion
Explain Newton's first law of motion with Galileo's experiment. Establish... -
Mass and Inertia
Explain Newton's first law of motion with Galileo's experiment. Establish t... -
Force and Laws of Motion - Exam Decoded - 2
Explain Newton's first law of motion with Galileo's experiment. Establish t...
ICSE 9 - Physics
Asked by aarshareny07 | 26 Jul, 2021, 05:41: PM
ANSWERED BY EXPERTICSE 9 - Physics
Asked by bickyjat25 | 15 Jul, 2021, 06:15: PM
ANSWERED BY EXPERTICSE 9 - Physics
Asked by harshchaudhary8822.9sdatl | 25 Sep, 2020, 05:36: PM
ANSWERED BY EXPERTICSE 9 - Physics
Asked by aryan2mumbai | 01 Sep, 2020, 07:49: PM
ANSWERED BY EXPERTICSE 9 - Physics
Asked by dragondaksh25 | 08 Aug, 2018, 03:33: PM
ANSWERED BY EXPERT