Solar cells are used to trap sunlight energy (light energy) and convert it to electric energy for domestic and other purposes.
Answer:
b) 338 N
Explanation: let m be the mass of the gymnast and a be the acceleration of the gymnast.
the force required to accelerate the gymnast is given by:
F = m×a
= (45.0)×(7.50)
= 337.5 N
Therefore, the force a trampoline has to apply is 138 N.
Average speed = distance / time
Average speed = 90 km / 0.5 hrs
Average speed = 180 km per hour
