a ball is dropped from rest off a cliff of height 50m, determine the final velocity of the ball assuming no air resistance.
Consider the appropriate equation of motion to solve this (use SUVAT method). The equation v^2=u^2+2as is appropriate to solve. Substituting in the knowns gives v=+sqrt(29.8150)=31.32 which, quoted to the correct number of significant figures is 30m/s
CJ
Related Physics A Level answers
All answers ▸Describe simple harmonic motion (SHM). Sketch a displacement-time graph for a particle undergoing SHM and the corresponding velocity-time and acceleration-time graphs. Use these graphs to describe the relationship between accleration and displacment.
State assumptions made about the motion of the molecules in a gas in the derivation of the kinetic theory of gases equation.
Explain the photo-electric effect and describe how the intensity of light effects rate of electron emission.
What is the definition of the photoelectric effect?