Explanation:
Given that,
Distance covered, d = 32 m
Time, t = 8.7 m
Final speed of the truck, v = 2.1 m/s
(a) Let a is the acceleration and u is the original speed of the truck.
Using first equation of kinematics as :
..............(1)
Using second equation of kinematics as :
...........(2)
On solving equation (1) and (2) we get :
Original speed,
(b) Acceleration,
Hence, this is the required solution.
Electric force occurs between positive and negative electric charge. It can be calculated with formula where F is force, Q1 and Q2 are charges, A is area of object usually ball (
) because we describe charges as points in space like electrons and protons,
is a natural dielectric constant of empty space or vacuum (
) and
also known as relative dielectric variable.
There are two types of the force:
1. Attractive electric force
2. Repulsive electric force
Attractive electric force occurs between positively and negatively charged objects while repulsive occurs between equally charged objects for eg. (positive and positive will repulse).