Answer:
4
Explanation:
friction
weight
normal reaction
force to overcome inertia
Answer:
P = I V power produced by source at voltage V thru resistance R
I = V / R current thru resistance R
P = V^2 / R
Power produced will decrease as the output resistance R increases
Check: if R increases to ∞ the power produced will go to zero
Answer: 7 kg bowling ball must move with a speed of 2.8 m/s so that it has the same kinetic energy.
Explanation:
Kinetic energy is the energy possessed by a body by virtue of its motion.

m = mass of object
v= velocity of the object

b) for a 7 kg bowl to have kinetic energy of 27 Joules:



Thus 7 kg bowling ball must move with a speed of 2.8 m/s so that it has the same kinetic energy
A because it only has one electron in the outer shell.