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A 3.0 m long rigid beam with a mass of 105 kg is supported at each end. An 70 kg student stands 2.0 m from support 1. How much upward force does each support exert on the beam?
A disk of mass 54 kg is held by a spring of unstretched length 63 cm and stiffness constant 300 N/cm, and rests on a frictionless table.
A 60.0 resistor is connected in parallel with a 116.0 resistor. This parallel group is connected in series with a 20.0 resistor. The total combination is connected across a 15.0 V battery. Find the
A disk initially rotating at 120 rad/s is slowed down with a constant angular acceleration of magnetude 4 rad/s^2 a) how much does the disk take to stop? b) through what angle doe the disk rotate d
A hockey puck moving at 0.474 m/s collides elastically with another puck that was at rest. The pucks have equal mass. The first puck is deflected 35.8° to the right and moves off at 0.331 m/s.
An oscillator of 5 kg is attached to a spring with constant 2000 N/m and compressed a distance of 0.6m. What is the value of b that will cause the oscillator to be critically damped? What is the ti
An electric field with a magnitude of 152 N/C exists at a spot that is 0.18 m away from a charge. At a place that is 0.51 m away from this charge, what is the electric field strength?
A uniform electric field of magnitude 350 N/C pointing in the positive x-direction acts on an electron, which is initially at rest. The electron has moved 3.60 cm. What is the work done by the field
Calculate the maximum height x above the floor at which the person can push the lamp so that it slides rather than tips.
The skier's mass is 59.0 kg, and the coefficient of kinetic friction between the skis and the snow is 0.100. Find the magnitude of the force that the tow bar exerts on the skier.
A charge of +3.2 10-5 C is located at a place where there is an electric field that points due east and has a magnitude of 17500 N/C. What are the magnitude and direction of the force acting on the
What is the magnitude and direction of the current in the smaller loop if the total magnetic field at the center of the system is zero?
A student (m=63 kg) falls freely from rest and strikes the ground. during the collision with the ground, he comes to rest in a time of .101 s. The average force exerted on him by the ground is +1800
A small object rests on the bottoms of the cistern and at its center. how far from the right edge of the cistern can a girl whose eyes are 1.2 from the ground stand and still seee the object?
A Federation starship ( 1.80×10^6 kg) uses its tractor beam to pull a shuttlecraft ( 2.10×10^4 kg) aboard from a distance of 15.0 km away. The tractor beam exerts a constant force of 4.0
A 200 block on a 54.0 -long string swings in a circle on a horizontal, frictionless table at 95.0. What is the speed of the block?
How far apart are two rocks on the moon that can be resolved by a telescope on the earth, whose diameter is 6 m, if the wavelength of the light is 540 nm?
A 135.0 kg box is pushed by a horizontal force F at constant speed up a frictionless ramp which makes an angle of 30.0 deg with the horizontal. Find the magnitude of the applied force F.
What is the elastic potential energy of the drawn bow? The arrow has a mass of 0.0300 kg. How fast is it traveling when it leaves the bow?
There are two level or horizontal areas on the graph. what do these areas represent? At what two temperatures do you expect them to occur?
A traffic light is supported by two wires, which make an angle of 80.° to each other. If the maximum tension in each wire is 750 N, what is the maximum weight of the light they can support?
A cannonball launched with an initial velocity of 141 m/s at and angle of 30° follows a parabolic path and hits a balloon at the top of its trajectory. Neglecting air resistance, how fast is it
A bullet is fired vertically into a 2.00 block of wood at rest directly above it. If the bullet has a mass of 28.0 and a speed of 390, how high will the block rise after the bullet becomes embedded
At what angle must you point the jet ski if your velocity relative to the ground is to be perpendicular to the shore of the river?
A long wire lying along the x-axis carries a current of 1.00 A in the +x direction. There is a uniform magnetic field present, given by B=0.003i + 0.004j + 0.002k, (where i, j, k are the unit vector