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A wagon is rolling forward on level ground. Friction is negligible. The person sitting in the wagon is holding a rock. The total mass of the rider, wagon, and rock is 91 kilogram. The mass of the rock is 0.25 kilogram. Initially the wagon is rolling forward at a speed of 0.53 m/s. Then the person throws the rock with a speed of 16m/s. Both speeds are relative to the ground. Determine the speed of the wagon after the rock is thrown
(a) directly forward in one case and
(b) directly backward in another.
A rifle with a weight of 20 N fires a 3.0 g bullet with a speed of 260 m/s. If a 700 N man holds the rifle firmly against his shoulder, find the recoil speed of the man and rifle
A 0.18kg rubber ball is dropped from a height of 1.2m above the floor and it bounces back to a height of 0.70m. What is the speed of the ball just as it leaves the ground
At a temperature of 0° C, the mass and volume of a fluid are 798 kg and 1.25 m3. The coefficient of volume expansion is 1.25 10-3(° C)?1. What is the density of the fluid when the temperature has risen to 21.0° C
Four people with a combined mass of 300kg are riding in a 1100kg car. When they drive down a washboard road with bumps spaced 5.1m apart, How much does the car rise up on its springs
find the tangential and centripetal components of the net force exerted on a car (by the ground) when its speed is 38 m/s, and it has accelerated to this speed from rest in 9.5 s on a curve of radius 370 m. The car's mass is 1000 kg.
110 grams of boiling water (temperature 100° C, heat capacity 4.20 J/gram/K) are poured into an aluminum pan whose mass is 1000 grams and initial temperature 24° C (the heat capacity of aluminum is 0.9 J/gram/K).
A red laser from the physics lab is marked as producing 632.8-nm light. When light from this laser falls on two closely spaced slits, What is the wavelength of light produced by the pointer
A box is sliding across a board that make an angle of 15 degrees with the horizontal. What is the acceleration of the box
an electron starts from rest 5.00 cm from the center of a uniformly charged sphere of radius 4.00 cm. if the sphere
the plane of a rectangular coil 4.0 cm by 7.0 cm is perpendicular to the direction of a magnetic field . if the coil
A 1200 kg car rounds a corner of radius r = 45m. If the coefficient of static friction between the tires, what is the greatest speed the car can have in the corner without skidding
A car rounds a banked curve. The radius of curvature of theroad is R, the banking angle is ?, and the coefficient of staticfriction is µ. Determine the range of speeds the car can have without slipping up or down the road
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