Because after each impact it loses a fraction of its original energy, because it gets transfered to the floor. this is the reason that a perpetual motion machine is impossible. you cannot have infinite energy, because to perform a task, energy must be spent. hope i helped :3
Answer:
The total frictional force is 358.0 newtons
Explanation:
Power is the amount of average work (W) an object does on a period of time (Δt):
Remember average work is average force (F) times displacement (Δs):
but displacement over time is average speed , then:
(1)
That is, the power of the car is the force the engine does times the speed of the car. As the question states, if the car is at constant velocity then the power developed is used to overcome the frictional forces exerted by the air and the road, that is by Newton's first law, the force the motor of the car does is equal the force of frictional forces. So, to find the frictional forces we only have to solve (1) for F:
Knowing that 1hp is 746W then 30hp=22380W and 1 mile = 1609m then 140 mph = 225308 = , then:
Answer:
Matter
Explanation:
Any type of material is a matter. It can be anything that occupies space and have mass. It is a composition of atoms which in term is made up of electrons, protons and neutrons. All particles in our universe is matter because everything has some mass and it occupies space.
Answer:
Explanation:
Considering it to be True or False Statements
(a)True ,
when Potential Energy of the system is zero then force on the object is zero
(b)True
When ball is thrown upward it faces air resistance of greater magnitude because of the high speed of ball. while on returning the speed of ball gradually increase therefore it take more time to reach same spot
(c)True
Change in gravitational Potential Energy of two balls will be different as gravitational Potential Energy depends on the distance of object from datum.
Also Potential Energy can also be negative as it depends on reference
(d)False
if Force on object is zero then Potential Energy is constant not zero
i.e.