To solve this problem it is necessary to apply the concepts related to energy conservation.
In this case the kinetic energy is given as
Where,
m = mass
v= Velocity
In the case of heat lost energy (for all 4 wheels) we have to
m = mass
Specific Heat
= Change at temperature
For conservation we have to
Therefore the temperature rises in each of the four brake drums around to 47°C
Explanation:
Total number of buses =9178181
Answer: The correct option is A.
Explanation:
Inertia is a state of an object or body to maintain its state. It resists any change in its state.
Newton's first law of inertia: When an objects is in state of motion, it will remain its state of motion or if it is in state of rest then it will remain in rest unless it is acted upon by external motion.
In the given options, a ball sits motionless on the ground is good example of Newton's first law motion. No external force is acting in this case.
In options (B), (C) and (D) , the external force is acting.
Therefore, the correct option is A.
As the Force of friction is equal to
µ
by using the Law of Action Reaction; as the force normal is the conterforce of gravity
µ
µ
Therefore, by looking at the equation we can infer that
The force of friction is directly proportional to the mass, gravitational constant, and the co-efficent of friction
Because the gravitational constant is dependant on gravitation, a planet's mass and radius also affect the force of friction
But DO NOTE:
That the co-effecient of friction is only applicable between two rubbing surfaces and unaffected by gravitational constants.
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Answer:
magnetic resonance imaging
