A race car exerts 19,454 n while the car travels at a constant speed of 201 mph, 91.36 m/s.what is the mass of the car?
2 answers:
Answer:
The mass of the car is 1985.10 kg.
Explanation:
It is given that,
Force exerted by the race car, F = 19,454 N
The constant speed of the car, v = 201 mph
We need to find the mass of the car. Let it is given by m. It can be calculated using Newton's second law of motion. It is given by :
The car is exerting this force under the action of gravity. Here, a = g
m = 1985.10 kg
So, the mass of the car is 1985.10 kg. Hence, this is the required solution.
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Answer:
Final speed of striped ball is 3 m/s in left direction .
Explanation:
Given :
Two billiard ball with the same mass moves toward the left at the same speed 3 m/s .
Let , us assume right hand side direction to be positive and left hand side direction to be negative .
Also , let speed of ball after collision is (striped ball ) u and (solid ball) v .
It is also given that the collision is elastic .
Therefore , kinetic energy is conserved .
...... ( 1 )
Also , by conserving linear momentum .
We get :
...... ( 2 )
Putting value of u from equation 2 to equation 1 .
We get :
And , u = -3 m/s .
Therefore , final speed of striped ball is 3 m/s in left direction .
Hence , this is the required solution .