Answer:
here there is also an electric attraction force
Explanation:
In the insulating bodies the charges are not mobile, so when one of the body is charged periodically or gained some electrical charges.
When the body is neutral the net number of electric charges is zero. When the loaded body touches it, it repels the charges of the same sign whereby the induced load is of a different sign and the two adhered sheets are attracted.
With this explanation it is equivalent to that of the ball and the wall, so here there is also an electric attraction force
Answer: It'd be 14.
Explanation:
The formula for this equation would be (57f-32)×5/9 which is equal to 13.889; and rounding that to the whole number would be 14.
One of the last two answers
Would be a. since KE = 1/2 m*v^2
Answer: - 7500N
Explanation:
Given the following :
Initial Velocity of car = 108km/hr
Time taken to stop after applying brakes = 4s
Mass of passengers in car = 1000kg
Force exerted by the brakes on the car =?
After 4s, then final Velocity (V) = 0
Initial Velocity (u) of the car = 108km/hr
108km/hr = (108 × 1000)m ÷ (3600)s = 30m/s
Force exerted = mass(m) × acceleration(a)
Acceleration of car = Change in Velocity with time
a = (v - u) / t
a = (0 - 30) / 4
a = - 30/ 4
a = - 7.5m/s^2
Therefore,
Force exerted = mass(m) × acceleration(a)
Force exerted = 1000kg × (-7.5)m/s^2
Force exerted = - 7500N