What is friction and how does it affect objects in motion?
2 answers:
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Answer:
speed of each marble after collision will be 1.728 m/sec
Explanation:
We have given mass of the marble
Velocity of marble
Its collides with other marble of mass 25 gram
So mass of other marble
Second marble is at so
We have to find the velocity of second marble
From momentum conservation we know that
, here v is common velocity of both marble after collision
So
v = 1.428 m /sec
So speed of each marble after collision will be 1.728 m/sec
Answer :
(a) The acceleration of the car is,
(b) The distance covered by the car is, 150 m
Explanation :
By the 1st equation of motion,
...........(1)
where,
v = final velocity = 5 m/s
u = initial velocity = 25 m/s
t = time = 10 s
a = acceleration of the car = ?
Now put all the given values in the above equation 1, we get:
The acceleration of the car is,
By the 2nd equation of motion,
...........(2)
where,
s = distance covered by the car = ?
u = initial velocity = 25 m/s
t = time = 10 s
a = acceleration of the car =
Now put all the given values in the above equation 2, we get:
By solving the term, we get:
The distance covered by the car is, 150 m