Answer:
Explanation:
opposite charges attract each other, while rubbing the objects together they developed opposite charges which caused them to drift together
The statement which best describes how light waves travel in an uniform medium is in straight lines. The correct answer will be A.
Answer:
Explanation:
Kinetic energy of ball in motion = 1/2 m v² . Potential energy = 0
Let the minimum distance between the balls be d on collision.
Electric potential energy at that time= k Q²/d , Here kinetic energy is converted into potential energy . So
1/2 m v² = kQ²/d
d =2 k Q² / mv²,= 18 x 10⁹ x Q²/ m v².
It found on Earth atmosphere.
Answer:
Explanation:
Given
Object fall from a height of 
Considering initial velocity to be zero i.e. 
using
where v=final velocity
u=initial velocity
a=acceleration
s=displacement
(b)Average acceleration
After falling 45 m, object strike the car and comes to rest after covering a distance of 0.5 m
again using
here final velocity will be zero i.e.
initial velocity 
(c)time taken by it to stop
