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A 300g rock tied to a string is rotated in a vertical circle (up and down, so gravity is important) with radius 0.5m. Model the rock as a point particle. If a torque of 2Nm is applied for 3s, what is the rotation rate of the rock? What is the tension in the string at the top of the circle?
An air-traffic controller observes two aircraft on his radar screen. The first is at altitude 750 m, horizontal distance 19.8 km, What is the distance between the two aircraft
At time t = 0 s, a puck is sliding on a horizontal table with a velocity 3.60 m/s, 35.0° above the +x axis, What is the velocity of the puck at time t = 1.50 s
Two red blood cells each have a mass of 9.05 × 10-14 kg and carry a negative charge spread uniformly over their surfaces. What is the maximum accleration of the cells as they move toward each other and just touch
A kayaker needs to paddle north across an 85 m wide harbor. The tide is going out, creating a tidal current that flows to the east at 1.7 m/s. The kayaker can paddle with the speed of 3.0 m/s.
A parallel plate capacitor has square plates with sides of length 20 cm. The distance between the plates is 4 mm. The plates are charged up to 50volts, What is the energy stored by the capacitor
An object with a mass of 0.427kg is attached to a long horizontal spring with a constant of 42.6kg/s2. How long does it take the the particle to move from -0.500m to 0.500m
Ikjoo Yoo of the Tampa Bay Lightning has had his slap shot clocked at 102.1 mph (45.64 m/s). How much momentum is lost in the collision
A small container of water is placed on a carousel inside a microwave oven, at a radius of 11.5 cm from the center. What angle does the water surface make with the horizontal
It requires 78.73 J of work to lift a rock to a height of 4.03 m. What is the mass of the rock
On a banked race track, the smallest circular path on which cars can move has a radius of 120 m, while the largest has a radius 155 m, Find the smallest speed at which cars can move on this track without relying on friction
Two runners compete in a race of 10.04 km. One runner has a steady speed of 11.14 km/h. What is the difference in time for the two runners
A 58 g tennis ball is served at 40 m/s. Find the de Broglie wavelength of the tennis ball
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