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A 95-kg fullback, running at 8.2 m/s, collides in midairwith a 128-kg defensive tackle moving in the opposite direction.Both players end up with zero speed.
a) Identify "before" and "after" and make adiagram of the situations.
b) What was the fullback's momentum beforethe collision?
c) What was the change in the fullback'smomentum?
d) What was the change in the tackle's momentum?
f) How fast was the tackle moving originally?
The battery for certain cell phone is rated at 3.70V. According to the manufacturer it can produce 3.15 X 10^4 J of electrical energy, find the average current that this cell phone draws when turned on
Radium decomposes radioactively to form radon (atomic number 86, which is also the number of protons in the nucleus) by emitting an alpha-particle from its nucleus, What is the acceleration of the alpha-particle at this distance
A LASIK vision correction system uses a laser that emits 10 ns-long pulses of light, each with 2.5 mJ of energy. What is the average power of each laser pulse
A damped oscillator is described by the equation m [(x)\ddot] = -b [(x)\dot] - kx . What is the condition for critical damping? Assume this condition is satisfied.
A 0.230- coffee cup at 19 is filled with 0.240 of brewed coffee at 97. The cup and the coffee come to thermal equilibrium at 79.If no heat is lost to the environment, what is specific heat of the cup material.
A non-uniform beam of length 4.41m and weight 1.02kg makes an angle of 25.2 with the horizontal. Find the vertical component of the force exerted on the beam by the pivot
A 2.36 kg mass with an initial velocity of v1 = aˆi, where a = 5.75 m/s collides with, Find the final speed of the composite mass
An electric motor can lift a weight of 2000N through a height of 10 m in 20 sec. What is power of motor
A particle with charge Q = 4.70 µC is located at the center of a cube of edge L = 0.200 m. In addition, six other identical charged particles having q = -1.5 µC are positioned symmetrically around Q as shown in the figure below. Determine the electri..
As a new electical technician, you are designing a largesolenoid to produce a unitform 0.150 T magnetic field near thecenter of the solenoid, What current will you need to produce the necessary field
A runner with the weight of 686.7 N accelerates at a constant rate from 0 to 45 m/s in the first 2 seconds of a 100 m sprint. What is the net force
A circuit contains a 150-? resistor, a 0.0530-H inductor, a 0.420-?F capacitor, and a source of time-varying emf connected in series. Determine the voltage drop across the inductor
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