The planets revolving around the sun, The moon revolving around the Earth.
Answer:
yes friction is needed hope this helps might of been to long tho
Answer:
Explanation:
The electron has a negative charge. Proton is positive and neutron is neutral.
I'm pretty sure the energy an object acquires when exposed to a force is known was potential energy.
Answer:
4 m/
Explanation:
From Equilibrium of forces, The Tension in string is cancelled by the Weight (product of mass and acceleration due to gravity) of the body acting downwards.
The Net force = Mass * Acceleration.
Since Net Force = 20 Newton, Mass = 5kg, therefore;
20 = 5kg * acceleration. Dividing the RHS and LHS of the equation by 5, we have;
Acceleration =
which gives 4.
Note: RHS means Right Hand Side.
LHS means Left Hand Side.