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An athlete executing a long jump leaves the ground at a31.2^\circ angle and travels7.70 m.
a) What was the takeoff speed in m/s?
b) If this speed were increased by just 3.0%, how much longer would the jumpbe?
Donovan Bailey set a world record for the 100-m dash on July 27, 1996. If observers on a spaceship moving with a speed of 0.7705 c relative to Earth saw Donovan Bailey's run
An entertainer, when performing a bubble trick, forms one bubble inside another. The surface tension of the bubble liquid is ?=0.04 N m-1. What is the gauge pressure in the inner bubble
An ethernet cable is 4.15 m long and has a mass of 0.195 kg. A transverse pulse is produced by plucking one end of the taut cable. What is the tension in the cable
The magnetic field in a region of space is specified by its x, y, and z components which are respectively Bx = 0.138 T, By = 0.166 T, find the magnitude and direction of the force acting on the wire
Three identical masses of 360kg each are placed on the x axis. One mass is at = -110cm , one is at the origin, find the magnitude of the net gravitational force on the mass
A playground merry-go-round has a radius of 4.50m and a moment of inertia of 240kg?m2 and turns with negligible friction about a vertical axle through its center. What is the average power supplied by the child
There is a tree in the middle of your front yard and you take pictures of a squirrel as it runs around the tree. what is the average acceleration of the squirrel between the first and third pictures
When a potential difference of 2 V is applied across the ends of a wire of 5 m length, a current of 1A is found to flow through it. Calculate: the resistance per unit length of the wire
A proton accelerates from rest in a uniform electric field of 690 N/C. At one later moment, its speed is 1.30 Mm/s, Find the acceleration of the proton
A hydraulic chamber with a spring (spring constant = 1600 N/m) attached to the input piston and a rock of mass 40kg resting on the output plunger.
A 3.0cm tall object is 50cm in front of a convex mirror that has a -20 cm focal length. Calculate the image position in cm behind the mirror
A charge of +2?C and 6 mg is fired directly upward at a speed of 500 m/s. The charge reaches the top of its trajectory at 30 m. Ignoring gravity, find the magnitude and direction of the electric field necessary to accomplish this.
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