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Q1. There is a well-known legend about physicist Isaac Newton. It says that he was inspired into his improvement of the Law of Gravitation as resting under a tree and having an apple fall (free-fall) on his head from one of the branches of the tree. Assume the apple was 3.90 meters above ground before falling, even as Newton's head was 90 centimetres above ground. How long did it take the apple to hit Newton after falling off? (Apple falls from rest)
Q2. A box of books weighing 312 N is shoved across the floor by a force of 425 N, exerted downward at an angle of 35.2 below the horizontal. If coefficient of kinetic friction between the box and the floor is 0.570, how long does it take to move the box 4.00 m, starting from rest?
Q3. Draw a graph of velocity vs. time for an object that has:
a. A positive initial velocity and a constant positive acceleration.
b. A positive initial velocity and a constant negative acceleration.
c. A positive initial velocity and no acceleration.
An object is placed 100 cm in front of a lens of focal length 20 cm. A second lens is placed 35 cm beyond the first, what is the height of the final image
A toroidal solenoid has a mean radius of 18.0cm and a cross-sectional area of 3.20cm2 and is wound uniformly with 85.0 turns. What is the mutual inductance of these coils
Estimate the time the ball is in contact with the floor to be 0.06 seconds. Compute the average force the floor exerts on the ball.
A mass of 1.85 kg is moving 0.413 m/s when it drops into a student's hand. What is the average force that the hand exerts on the mass
You have been called to testify as an expert witness in a trial involving an automobile accident, determine that the coefficient of kinetic friction between the wheels and the pavement at the time of the accident was 0.59
Calculate the acceptance cone angle for a fiber optic cable that has an index of 1.70 for the fiber core and a 1.47 index for the cladding. What is the acceptance cone angle
What is effectiveness of battery as an energy storage device
A 11.0g bullet is fired horizontally into a 103g wooden block that is firstly at rest on a frictionless horizontal surface and connected to a spring of constant 154N/m. The bullet becomes embedded in block. If the bullet-block system compresses the s..
The water molecule H2O, with a permanent dipole moment of magnitude 6.2*10^-30 Cm, What force does the ion exert on the water molecule
Suppose the Sun could collapse into a neutron star of radius 12.0 km without losing any mass in the process. Calculate the orbital speed of the probe
q1. a motorist travelling with constant velocity of 15 ms about 34 mph passes a school crossing corner where the speed
An Australian emu is running due east in a straight line at a speed of 17.5 m/s and slows down to a speed of 12.2 m/s in 4.1 s. (a) What is the direction of the bird's acceleration? (b) Assuming that the acceleration remains the same, what is the ..
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