A television of mass 13 kg sits on a shelf. What is the normal force acting on the television?
2 answers:
Answer:
Normal force, F = 127 N
Explanation:
It is given that,
Mass of the television, m = 13 kg
It is sitting on the shelf. We have to find the normal force acting on it. The forces acting on it are normal force and its weight. So, the normal force is given by :
F = mg
g = acceleration due to gravity
F = 127.4 Newton
or
F = 127 N
Hence, the normal force acting on the television is 127 N
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Answer:
Force,
Explanation:
Given that,
Mass of the bullet, m = 4.79 g = 0.00479 kg
Initial speed of the bullet, u = 642.3 m/s
Distance, d = 4.35 cm = 0.0435 m
To find,
The magnitude of force required to stop the bullet.
Solution,
The work energy theorem states that the work done is equal to the change in its kinetic energy. Its expression is given by :
Finally, it stops, v = 0
F = -22713.92 N
So, the magnitude of the force that stops the bullet is