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A car moving at a constant speed of 7.5 m/s, moves 25 m at a 20 degree angle above horizontal. How much time does it take the car to accomplish this movement
Emily has a field with uniformly cut grass of height 2 cm which grows at a constant rate. How long would it sustain each animal alone
Four objects are situated along the y axis as follows: a 1.94-kg object is at +2.98 m, Where is the center of mass of these objects
A thin rod L meters long has a linera density that varies as \(\rho (x) = \rho_{0} e^{-ax}\). Find the mass of the rod
If the flywheel on my truck has a mass of 22.8Kg a radius of .4572 meters and is rotating at 250 revolutions per minute
Two toy locomotives approach each other along the same line, and upon collision both stop dead still. What is the mass of the slower locomotive
Two particles of masses m and 3m are moving toward each other along the x-axis with the same speed v. Determine the final speed of the heavier object
A compass originally points North; at this location the horizontal component of the Earth's magnetic field has a magnitude of 2e-5 T. What is the magnetic dipole moment of the bar magnet
A 0.15 kg baseball is hit by a baseball bat. Right before it is hit, the ball's speed is 30 m/s, find the magnitude of the net impulse that is applied to the ball
A croquet mallet delivers an impulse of 8.07 N s to a 0.54- kg croquet ball initially at rest. What is the speed of the ball immediately after being struck
The magnetic coils of a tokamak fusion reactor are in the shape of a toroid having an inner radius of 0.700 m and an outer radius of 1.30 m. Find the magnitude of the magnetic field inside the toroid
A horizontal spring with a spring constant of 0.5 N/m sits on a frictionless table. what is the magnitude of the acceleration of the mass
A m = 3 kg steel ball strikes a wall with a speed of v = 10 m/s at an angle of ?i = 60? with the surface. Determine the impulse given to the ball
A uniform disk with a mass of 775 g and radius 17.0 cm is rotating on frictionless bearings with an rotational speed of 18.0 Hz, What is the new rotational speed of the disk
Consider the mass on aspring system in Figure P11.20. Three identical springs, What is the frequency of this simple harmonic oscillator
Light of wavelength 655 nm is used to illuminate normally two glass plates 20 cm in length that touch at one end, How many bright fringes appear along the total length of the plates
Two toy locomotives approach each other along the same line, and upon collision both stop dead still. What is the mass of the faster locomotive
A 72- kg ice hockey player standing on a frictionless sheet of ice throws a 6.2- kg bowling ball horizontally with a speed of 3.1 m/s
A block of mass 2.50 kg is pushed 2.40 m along a frictionless horizontal table by a constant 16.0 N force directed 25.0° below the horizontal. Determine the work done by the force of gravity
Monkey first notices a lion attacking when the lion is 12.5 m away and moving toward the monkey at a speed of 5 m/s. How long does the monkeys escape last
An aluminum rod of length l has a resistance of .8 ohms. Half of the rod is machined down so that half of the rod now has half of the radius of the original radius. What will be the new resistance
The weight of passengers on a roller coaster increases by 60% as the car goes through a dip with a 30m radius of curvature
In one day, a 75 kg mountain climber ascends from the 1500-m level on a verical cliff to the top at 2400m. What is the change in her gravitational potential energy
A 4.50 kg package slides 1.30 m down a long ramp that is inclined at 10.8° below the horizontal. Calculate the total work done on the package
A 10 gauge copper wire carries a current of 27 A. Assuming one free electron per copper atom, calculate the drift velocity of the electrons