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A 90 kg linebacker running downfield at 10 m/s collides with a 65 kg referee who is at rest.
a) What is their final momentum?
b) What is the final velocity of the linebacker-referee system?
c) What is the initial kinetic energy of the linebacker?
d) What is the initial kinetic energy of the referee?
e) Is kinetic energy conserved? f) Is momentum conserved?
A projectile is launched vertically from the surface of the earth with an initial speed of 7.00 km/s. At what height (km) will it stop and begin to fall back to the surface of the earth
At the bottom of its path, the ball strikes a 3.80 kg steel block initially at rest on a frictionless surface. The collision is elastic. Find out the speed of the ball just after the collision ?
A 20kg suitcase is being pulled with constant speed by a handle that is at an angle of 22degrees above the horizontal. what is the force F applied to the handle
The power needed to operate your body is about 100 {rm watts}. Suppose your body could run on fusion power and could convert a total of 0.7 of its mass into energy. How much energy would be available through fusion? Assume the mass is 70kg.
How much power must you exert to horizontally drag a 20.0 kg table 14.0 m across a brick floor in 40.0 s at constant velocity, assuming the coefficient of kinetic friction between table and floor is 0.550.
Gamma rays are photons with very high energy. What is the wavelength of a gamma-ray photon with energy 605 keV
A 340kg wooden raft floats on a lake. When a 65kg man stands on the raft, it sinks 3.0cm deeper into the water. When he steps off, What is the total energy of vibration
A hollow, conducting sphere with an outer radius of 0.252 m and an inner radius of 0.210 m has a uniform surface charge density of +6.57×10?6 C/m^2. find the new charge density on the outside of the sphere
A block of mass m1 = 4.00 kg on a frictionless inclined plane of angle 30.0° is connected by a cord over a massless, What is the magnitude of the tension in the cord
a projectile is fired horizontally from a gun that isnbsp61.0nbspm above flat ground emerging from the gun with a speed
A 13.0 k? resistor and a capacitor are connected in series and then a 12.0 V potential difference is suddenly applied across them. Calculate the time constant of the circuit
After a golf ball is hit it takes off with an initial speed of 20.9 m/s and at an angle of 32.5° with respect to the horizontal. How far would the ball fly if the initial speed was doubled
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