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1. Draw a free body diagram for the following situations:
a) A car is moving at constant speed on highway;
b) A car is accelerating to enter a highway;
2. A dockworker loading crates on a ship finds that a 20-kg crate, initially at rest on a horizontal surface, requires a 75-N horizontal force to set it in motion. However, after the crate is in motion, a horizontal force of 60 N is required to keep it moving with a constant speed.
Find the coefficient of static and kinetic friction between crate and floor.
3. A 300-kg crate is placed on an adjustable inclined plane. As one end of the incline is raised, the crane begins to move downward. If the crate slides down the plane at constant speed when the incline angle is 25°, what is the coefficient of kinetic friction between ramp and crate?
A brave child decides to grab on to an already spinning merry-go-round. The child is initially at rest and has a mass of 26.5 kg. What is the moment of inertia of the merry-go-round with respect to its central axis
During a 56-ms interval, a change in the current in a primary coil occurs. What is the change in the primary current
A crate of mass 10.5 kilogram is pulled up a rough incline with an initial speed of 1.50 m/s. Find how much work is done by the 100 Newton force
A car travels up a hill at constant speed of 40km/h and returnsdownhill at the speed of 60km/h. Calculate the average speed for the round trip
A single, monochromatic light source is shined through an etched, flat prism with a slit separation of 0.025mm. How far away from the central maximum are the first and second maxima
one of the most powerful cranes in the world operates in switzerland. it can slowly raise a load of m 6900 tonnes to a
The following charges are located inside a submarine: 4.00 µC, -9.00 µC, 27.0 µC, and-48.0 µC. (a) Calculate the netelectric flux through the hull of the submarine.
in reaching her destination a backpacker walks with an average velocity of 1.34 ms due west. this average velocity
When a nucleus emits an alpha particle how does the atomic number, neutron number and nucleon number change? How do these three numbers change
How much work would be done by an electric field in moving a proton from a point at a potential of +181 to a point at a potential of 49.5V
A 1.0 meter long piece of coaxial cable has a wire with a radius of 1.1 millimeter and a concentric conductor with inner radius 1.3 millimeter. estimate what is the value of the dielectric constant
A heavy-duty stapling gun uses a 0.168 kg metal rod that rams against the staple to eject it. find the speed of the ram at the instant of contact
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