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A 7.80 gram bullet moving at 540 m/s penetrates a tree trunk to a depth of 6.4 centimeter.
(a) Use work and energy considerations to calculate the average frictional force that stops the bullet.
N
(b) Suppose the friction force is constant, calculate how much time elapses between the moment the bullet enters the tree and the moment it stops moving.
A 1.85 book is sliding along a rough horizontal surface. At point A it is moving at 3.35 , and at point B it has slowed to 1.41. How much work was done on the book between A and B
a bullet with massnbspm5.21nbspg is moving horizontally with a speednbspv560nbspnbspmswhen it strikes a block of wood
The distance between a loudspeaker and the left ear of a listener is 1.60 m. compute the time required for sound to travel this distance if the air temperature is 20° C.
A distant galaxy emits light that has a wavelength of 699.1 nm. On earth, the wavelength of this light is measured to be 701.6 nm, Decide whether this galaxy is approaching or receding from the earth
A crate of mass 45.0 kg is being transported on the flatbed of a pickup truck. The truck accelerates forward on level ground. What is the maximum acceleration the truck can have so that the crate does not slide relative to the truck's flatbed
Suppose we have a "half harmonic oscillator" potential, for example, exactly half of a parabolic potential on the right of the"center" and infinitely high potential barrier to the left of the center.
A particle moving along the x axis in simple harmonic motion starts from its equilibrium position, the origin, at t = 0 and moves to the right. Determine the maximum speed of the particle
A 100kg hollow sphere is neutrally buoyant and completely underwater. It's volume is 0.5 cubic meters. If this 0.5 cubic meter space is filled with a combination of helium and water, what fraction of this volume is helium?
equal and opposite 5 muc point charges are located at the points y plusmn .5 mm 5 muc at y .5 mm and -5
A physics professor is pushed up a ramp inclined upward at an angle 33.0^\circ above the horizontal as he sits in his desk chair that slides on frictionless rollers. The combined mass of the professor and chair is 82.0 kg.
A 395.0 g block is dropped onto a verticalspring with a spring constant k = 238.0 N/m. The block becomes attached to the spring, and the spring compresses0.24 m before momentarily stopping.
a cylindrical solenoid 40cm long with a radius of 5 mm has 300 tightly wound turns uniformly distributed along its
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