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An airplane pilot fell 355 m after jumping from an aircraft without his parachute opening. He landed in a snowbank, creating a crater 1.3 m deep, but survived with only minor injuries. Assume that the pilot's mass was 79 kg and his terminal velocity was 50 m/s. Model him as a particle.
a) Estimate the work done by the snow in bringing him to rest.
b) Estimate the average force exerted on him by the snow to stop him.
c) Estimate the work done on him by air resistance as he fell.
Two football players go to kick a ball at the same time. One kicks it with a velocity of 25ms-1 at an angle of 12o to the horizontal, What is the resultant velocity of the bal
If the fish starts from a distance 1.09 m from the base of the ledge over which the waterfall flows, Can the fish make this jump
An ambulance moving at 42 m/s sounds its siren whose frequency is 450 Hz. a car is moving in the same direction as the ambulance at 25 m/s. what frequency does a person in the car hear as the car approaches the ambulance? After the ambulance passe..
Three positive charges are fixed in place. Q 1= +4.0 nC and is located at (0,2), Q2= +1.0 nC and is located at (0,-1), What is the electric potential at the origin
The magnetic field perpendicular to a single 14cm diameter circular loop of copper wire decreases uniformly from 0.750 T to zero. If the wire is 2.25 mm in diameter, how much charge moves past a point in the coil throughout this operation.
You are designing a pendulum clock whose period can be adjusted by ±10% by changing the length of the pendulum. Determine the range of change of length which provide this flexibility in the period
You want to shoot a 19cm long arrow parallel to this axle and through the wheel without hitting any of spokes. Suppose that the arrow and the spokes are very thin.
The coil is flipped so its plane is vertical to the magnetic field in 0.050 s. What is the magnitude of the average induced emf.
You are walking along a small country road one foggy morning and come to an intersection. While you are crossing, you hear an ambulance siren, At what speed is the ambulance traveling
A 5.0mL syringe has an inner diameter of 4.5mm , a needle inner diameter of 0.29mm, What is the minimum force the nurse needs to apply to the syringe
how to determine the magnitude of the acceleration at the instant.
How much energy was added to accomplish the transformation. What force must be exerted on the smaller piston to support the load.
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