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Q1. A block with a mass of 20 g is pulled at a constant speed across a horizontal tabletop with a spring scale. The scale reads 65.3N. Calculate the coefficient of kinetic friction.
Q2. A curve of radius 50 m is banked for the design speed of 100 km/h. If the coefficient of static friction is 0.60 (wet pavement), at what range of speeds can a car safely create the curve?
Using the equation for the period of a pendulum, determine the period of a pendulum that is 3.0m long, Estimate the spring constant for each of the four springs on a 1260kg car if the static weight of the car causes the springs to compress 10.0cm
A gray kangaroo can bound across level ground with each jump carrying it 8.1m from the takeoff point. What is its maximum height above the ground
A 1.30 x10^3kg racecar is driving around a circular track of radius 159 m. What is the magnitude of the net force acting on the vehicle at this time and the force\'s direction relative to the velocity
A weather satellite encircles the earth at an orbital speed of 6200 m/s. How high above the earth's durface does it orbit
An automobile tire has a radius of 0.430 m, and its center moves forward with a linear speed of v = 14.0 m/s. Determine the angular speed of the wheel
Starting at rest, two students stand on 11.5-kg sleds, which point away from each other on ice, and they pass a 5.50-kg medicine ball back and forth. How fast is the student on the right moving after the pass
A plastic bag is filled with hydrogen at atmospheric pressure and 20.0 oC. Assume that the mass of the bag is negligible, How large a volume of hydrogen (in m3) is required
Four identical 7 mC charges are placed on a neutrally- charged penny, Determine the resulting potential in the center of the penny due to the four charges
A hockey puck slides off the edge of a table at point A with an initial velocity of 20.0 m/s, What is the speed (not the velocity) of the puck just before it touches the ground
A car with a mass of 1234 kg is travelling around a circular track with a radius of 100.m and a tangential velocity of 23 m/s. Determine the centripetal acceleration of the car
A copper wire has a square cross section 2.7 on a side. The wire is 3.8 long and carries a current of 4.0 . The density of free electrons is 8.5*10^28 m^-3.
A woman at an airport is towing her 14.0-kg suitcase at constant speed by pulling on a strap at an angle, What is the magnitude of the normal force that the ground exerts on the suitcase
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