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2. A man who has a mass of 80 kg can run up a flight of stairs of 20 steps in 5 seconds. Given the each steps in 20cm high, how much power does the man use to run up the flights of stairs?
acceleration of a car that comes to a stop from a velocity of 60 m/s in a distance of 360 m
Find the acceleration of a car that comes to a stop from a velocity of 60 m/s in a distance of 360 m.
The acceleration due to gravity at the surface of Mars is roughly 2/5 of Earth’s “g”. If an astronaut on Mars were to toss a wrench upward with a speed of 10 m/s, find a) how long it would rise, b) how high it would go, c) its speed at t = 3.0s , and d) its displacement at t = 3.0s.
A car is accelerating uniformly as it passes two checkpoints that are 30 m apart. The time taken between checkpoints is 4.0 s and the car’s speed at the first checkpoint is 5.0 m/s. Find the car’s acceleration and its speed at the second checkpoint. (calculus based)
The velocity of light in a liquid is 0.80 as fast as it is in air. What is the index of
refraction of the liquid?
A parallel plate capacitor has an area of 5cm² and 0.1mm apart. IN between the plates is a sheet of mica ( 4.8x10¯¹¹C²/N.m² ). Find its capacitance.
1. A patient was carried by a wheelchair push by a nurse along the handle with a parallel force of 50 Newtons at a distance of 50 m from the hospital garden. What work is done by the nurse?
Tom was able to see leah doing calculation in her space plane that was moving at 0.5c. Tom who is in
an inertial frame that is at rest uses his clock and notices that she takes exactly one minute to finish her
calculation. How much time did she take by his (Tom’s) clock?
If a charge of magnitude 6.5x10^17C is being held in a place 2x10^-8m from a charge of -8x10^-19C Which is also being held in place. What is the electric potential of the system
