Physics, 02.12.2021 01:50 mattgraham366
1. Plot a velocity-time graph using table:
Draw a line of the best fit and use your graph to find:
° Acceleration during the first 4 seconds
° The distance traveled in the first 4 seconds;
The distance traveled in the first 5 seconds;
The average speed during the 8 seconds of motion shown.
2. The diagram below shows a block of wood on a sloping surface. Copy the
diagram and label all the forces that act on the block of wood.
3. A spring stretches from 10 cm to 22 cm when a force of 4 N is applied. If it
obeys Hooke’s law, find its total length in cm when a force of 6 N is applied.
4. A rocket has a mass of 500 kg.
What is its weight on Earth, if g = 10 N/kg?
At lift-off the rocket engine exerts an upward force of 25 000 N. What is the
resultant force on the rocket?
What is its initial acceleration?
5. A ball is projected vertically upwards with an initial velocity of 30 m/s. Find its
maximum height and the time taken to return to its starting point. Neglect air
resistance and take g = 10 m/s2
.(Hint: the velocity of the ball is zero at its highest point.)
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Answers: 2
Physics, 22.06.2019 00:20, u8p4
Consider the particle-in-a-box problem in 1d. a particle with mass m is confined to move freely between two hard walls situated at x = 0 and x = l. the potential energy function is given as (a) describe the boundary conditions that must be satisfied by the wavefunctions ψ(x) (such as energy eigenfunctions). (b) solve the schr¨odinger’s equation and by using the boundary conditions of part (a) find all energy eigenfunctions, ψn(x), and the corresponding energies, en. (c) what are the allowed values of the quantum number n above? how did you decide on that? (d) what is the de broglie wavelength for the ground state? (e) sketch a plot of the lowest 3 levels’ wavefunctions (ψn(x) vs x). don’t forget to mark the positions of the walls on the graphs. (f) in a transition between the energy levels above, which transition produces the longest wavelength λ for the emitted photon? what is the corresponding wavele
Answers: 1
Physics, 22.06.2019 04:50, andrewsaul04
The position of a crate sliding down a ramp is given by x=(0.05t^3) m, y=(1.7t^2) m, z=(6−0.85t^5/2) m, where t is in seconds. (a) determine the magnitude of the crate's velocity when t = 2 s. (b) determine the magnitude of the crate's acceleration when t = 2 s.
Answers: 2
Physics, 22.06.2019 11:30, genyjoannerubiera
A100-watt light bulb illuminates a solar cell. the electricity from the solar cell operates a water pump that delivers 1 watt of power. what is the efficiency of the system?
Answers: 2
1. Plot a velocity-time graph using table:
Draw a line of the best fit and use your graph to find:...
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