Because in reality there are frictional forces acting on the ball, against the direction of its motion. In fact, because of the friction between the ball and the surface, the ball loses little by little its energy, so its velocity decreases and eventually it stops.
In an ideal world with no friction, there would be no forces acting on the ball, so its energy must be conserved and this means that the ball would continue its motion forever.
Answer:
10 m/s
Explanation:
∑F = ma
T = m v² / r
10 N = (1 kg) v² / (10 m)
v = 10 m/s
Answer:
The direction of the induced magnetic field should be pointing towards the screen.
Explanation:
Because the magnetic field is decreasing, and if we use Len's law, the induced current will increase the external magnetic field. For this increase to occur, said magnetic field produced by the induced current must be pointing towards the screen.
The wheel barrow can carry from heavy items to light items
Answer:
n = 1.6
Explanation:
The formula for the calculation of the absolute index of refraction is given as follows:
where,
n = index of refraction
c = speed of light in vacuum = 3 x 10⁸ m/s
v = speed of light in the piece of plastic = 1.87 x 10⁸ m/s
Therefore,
<u>n = 1.6</u>
