During the fall, the potential energy stored in the ball is converted into kinetic energy.
Thus,
PE = KE before hitting the ground
= 1/2 • mv^2
= 1/2 • 1 • 12^2
= 72J
Look on this website http://hyperphysics.phy-astr.gsu.edu/hbase/phyopt/sinslit.html
Answer: Car brakes produces more energy then the bicycle because the cars wheels produces a much bigger force that makes the car go and to stop that force the car uses greater amount of energy that transfers to heat but in a bicycle the wheels do not turn that fast so when you press the break there is less energy that transfer to heat.
Explanation:
Answer:
Explanation:
It is given that three cars has same mass m with speed
suppose rest two cars also has same mass m
As there is no external force therefore momentum is conserved
Initial Momentum 
Final momentum 
where v=final velocity
thus final velocity is
Answer:
There will be no change in the direction of the electric field .
Explanation:
The direction will remain the same because the sign of the charges has no effect on it.
When one replaces the conducting cube with one that has positive charge carriers there will be no change in the direction of the field as there is no defined relationship between the direction of the electric field and sign of the charge.
