Forces that are equal in strength and opposite indirection are
2 answers:
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There is one mistake in the question as unit of height of building is not given.So I assume it as meter.The complete question is here
You are on the roof of the physics building, 46.0 m above the ground. Your physics professor, who is 1.80 m tall, is walking alongside the building at a constant speed of 1.20 m/s. If you wish to drop an egg on your professor’s head, where should the professor be when you release the egg? Assume that the egg is in free fall.
Answer:
d=3.67 m
Explanation:
Height of building=46.0 m
First we need to find time taken by egg to reach 1.80 m above the surface
So to find time use below equation
As velocity 1.20m/s is given and we have find time.So we can easily find the distance
So
Explanation:
It is given that,
Initial height of the ball,
As it stops, its position, x = 0
It is in contact with the ground for 19.0 ms before stopping,
Initial speed of the ball, u = 0
(a) Let a is the acceleration of the ball during the time it is in contact with the ground. Its can be calculated suing equation of kinematics as :
a =-g
v = 18.25 m/s
(b) The average acceleration can be calculated as :
As the value of acceleration is positive, so the ball is accelerating in upward direction.
Answer:
The tension in the first wire is 70.24N and the tension in the second wire is 75.36N
Explanation:
Check attachment for solution
