The Efficiency of a car engine is 25%. The total resistance to motion is 1000 N when the car is moving at a constant velocity. If the energy in one litre of petrol is 40 MJ, how far can the car travel with 1.0 litre of petrol? [ 10 km ]
Displacement, Velocity and Acceleration
In classical mechanics, kinematics deals with the motion of a particle. It deals only with the position, velocity, acceleration, and displacement of a particle. It has no concern about the source of motion.
Linear Displacement
The term "displacement" refers to when something shifts away from its original "location," and "linear" refers to a straight line. As a result, “Linear Displacement” can be described as the movement of an object in a straight line along a single axis, for example, from side to side or up and down. Non-contact sensors such as LVDTs and other linear location sensors can calculate linear displacement. Non-contact sensors such as LVDTs and other linear location sensors can calculate linear displacement. Linear displacement is usually measured in millimeters or inches and may be positive or negative.
![aratio of the useful work done by a machine to the input energy is the efficiency
of the machine.
work done by machine
Efficiency =
x 100%
Energy input
output power
=
x 100%
(5.24 )
input power
Pout < Pin , n < 100%
and n is dimensionless
Example 21
The Efficiency of a car engine is 25%. The total resistance to motion is 1000 N when
the car is moving at a constant velocity. If the energy in one litre of petrol is 40 MJ,
how far can the car travel with 1.0 litre of petrol? [ 10 km ]](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F58b2383a-7c24-438a-8ea3-35cc6acdc899%2F9d979339-c1fa-45d7-9785-d290794df560%2Fxpfzri6_processed.jpeg&w=3840&q=75)
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
