Answer:
The glass rod remains charged due to electrification by the silk
A futuristic design for a car is to have a large solid disk-shaped flywheel within the car storing kinetic energy. The uniform flywheel has mass 370 kg with a radius of 0.500 m and can rotate up to 320 rev/s. Assuming all of this stored kinetic energy could be transferred to the linear velocity of the 3500-kg car, find the maximum attainable speed of the car.
Answer: 760 N
Weight is the force acting on the body due to gravity. This weight is shown by weighing scale which measures the normal force acting against the gravitational pull when the person stands on it.
When Lucy stands on the weighing scale, net force due to gravity is 
Hence, weight of Lucy is 760 N
Answer:
a = (V2 - V1) / t for uniform acceleration
t = (20 - 15/ m/s / 2 m/s^2 = 2.5 s
S = V1 t + 1/2 a t^2 distance covered
S = 15 * 2.5 + 2 / 2 * 2.5^2 = 37.5 + 2.5*2
S = 37.5 + 6.25 = 43.75 m
Answer: The velocity is decreasing over the time linearly not parabolically. About the mathematical relationship between y-velocity and time here says that there appears to be no outliers, the graph looks to have a strong positive connection, and because the graph is attached, it appears to be more linear.
Explanation:
