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1) A sky diver with an open parachute approches theground with constant velocity. There is no wind to blow him fromside to side. Which statement is correct?a) The skydiver is not in equallibrium.b) The force gravity is the only force acting on him, so thathe is in equalibrium.c) He wants to be in equalibrium but cant figure outhow.d) He is in equalibrium because no forces are acting onhim.e) He is in equalibrum because two forces act on him, thedownward force of gravity and the upward force of theparachute.
2) An object is moving at a constant velocity. Whichstatement has to be false?a) No forces act on the object.b) A single force acts on the object.c) Two forces acts simultaneously on the object.d) Three forces act simultaneously on the object.e) many forces act on him simultaneously.
3) Two boxes accelerate at the same rate when a force F isapplied to the first box and a force 3F is applied to the secondbox. If the first box has a mass M, the second box has amassa) 3Mb) 9Mc) Md) M/3e) M/9
A circular disk has surface charge density 8.0nC/cm^2. What will the surface charge density be if the radius of the disk is doubled? Express your answer to two significant figures and include the appropriate units.
A 230 gmeteoroid (a space rock) is at rest at the origin when internal pressure causes it to burst in two, Find the velocity of the other piece
two point charges are on the y-axis. a 5.0 microc charge is located at y 1.10 cm and a -2.00 microc charge is located
A particle with a charge of q = -5.10 nC is moving in a uniform magnetic field of vec{B}=( -1.24 T ) hat{z}. The magnetic force on particle is measured to be vec{F}= ( -7.60×10-7 N )hat{y}.
A skater of mass 82.0 kg initially movesin a straight line at a speed of 5.40 m/s.The skater approaches a child of mass 39.5kg, whom he lifts on his shoulders. Assuming there are no externalhorizontal forces, what is the skater's final velocity?
Then, 25 s later, the cyclist is 45 m due north of the flagpole, going due east with a speed of 12 m/s. For the cyclist in this 25 s interval, find out each of the following. (a) displacement (b) average velocity (c) average acceleration
A jogger accelerates from rest to 2.12 m/s in 3.34 s. A car accelerates from 24.1 to 38.6 m/s also in 3.34 s. Find the magnitude of the acceleration of the jogger
A charge of 2.05mC is placed at each corner of a square 0.160m on a side. Determine the magnitude of the force on each charge
A 2.20-kg object is attached to a spring and placed on frictionless, horizontal surface. A horizontal force of 11.0 N is required to hold the object at rest when it is pulled 0.200 m from its equilibrium position (the origin of the x axis). The ob..
A car is moving down a street at 53 km/h. A child all of a sudden runs into the street. If it takes the driver 0.74s to react and apply the brakes, how many meters will the car have moved before it begins to slow down?
The light then passes through an analyzer at an angle of 22.5º to the polarizer. What is the intensity of light leaving the analyzer
A 72 skydiver can be modeled as a rectangular "box" with dimensions 25 40 1.8 . What is his terminal speed if he falls feet first
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