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An 80-kg stuntman jumps from a window of a building situated 30 m about a catching net. Assuming that air resistance exerts a 100-N force on the stuntman as he falls, decide his velocity just before he hits the net.
An archer pulls her bow string back 0.40m by exerting a force that increases uniformly from zero to 25 N. How much work does the archer do in pulling back the bow.
A stockroom worker pushes a box with a mass 11.2kg on a horizontal surface with a constant speed of 3.50m/s. coefficient of kinetic friction between the box and the surface is 0.20.
when the car you are riding in stops suddenly heavy objects move toward the front of the car. why does a helium-filled
In an earthquake waves of several types move through the Earth and along its surface. One type is transverse waves that move along thesurface of the ground (these are the most destructive). You canthink of them as just like the waves you are used ..
The position vector,r, in meters, of a particle moving in the x-y plane, is giving by the following equation: r=i(2t^2-8t-12)+j(2t^3-18t^2+48t+25), find the direction of the velocity vector at the instant
a hole of radius 1 mm is at the bottom of a large water storage tank that is 15 m high. what is the volume flow rate av
A person wearing a seat belt can withstand an acceleration of -3.0 x 10^2 m/s^2. Explain how thick should barriers be to safely stop a car that hits a barrier at 110 km/h?
What is the tension in the rope that is lifting the lift and what is the tire's average angular acceleration during the 4.5 s time interval?
A small coin is placed on a flat, horizontal turntable. The turntable is observed to make three revolutions in 3.14s. What is the speed of the coin when it rides withoutslipping at a distance of 5.0 cm from the center of theturntable
On a certain amusement park ride, passengers are seated in a horizontal circle of radius 7.5m. the seats begin to rotate from rest and are uniformly accelerated for 21 seconds to a most rotational speeds of 1.4 rad/s.
An object is suspended on a frictionless inclined plane by a rope parallel to the incline, as illustrated above. what is the weight of the object
An object carries a charge of -6.6 µC, while another carries a charge of -2.0 µC. How many electrons must be transferred from the first to the second object
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