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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 wagon, rider, and rock is 95 kg. The mass of the rock is 0.33 kg. Initially the wagon is rolling forward at a speed of 0.48 m/s. Then the person throws the rock with a speed of 15 m/s. Both speeds are relative to the ground. Find the speed of the wagon after the rock is thrown (a) directly forward in one case and (b) directly backward in another.
A hunter aims directly at a target (on the same level) 140 m away.
Vector A - Vector B=(-51.4m)x, Vector C=(62.2m)x, and Vector A + Vector B + Vector C=(13.8m)x, Find Vector A and express in terms of unit vector x
An airfoil in a test chamber is exposed to air. Well ahead of the airfoil the pressure, temperature, and density are standard sea level conditions. Determine the velocity of the airflow
What is the magnitude of the force of upper leg on the lower leg at the knee joint.
A metallic sphere has a charge of +4.2 nC. A negatively charged rod has a charge of -6.0 nC. When the rod touches the sphere, 9.8 109 electrons are transferred. What are the charges of the sphere and the rod now?
A small sphere of charge q1 = 0.872 µC hangs from the end of a spring. When another small sphere of charge q2 = -0.642 µC is held beneath the first sphere, the spring stretches by d = 3.57 cm from its original length.
A stationary block of mass M - m is struck by a bullet of mass m traveling at speed v0. During the impact, obtain the speed of the block
What is the pressure change in water going from a 3.2- cm-diameter pipe to a 1.9- cm-diameter pipe if the velocity in the smaller pipe is 6.5 m/s
The motion of a very massive object is hardly affected by what would seem to be a substantial force. Consider a supertanker, with a mass of 2.7×10^8 kg. find what will be the magnitude of its acceleration
The work function for barium is 2.50 eV. Find the cutoff wavelength for barium
You throw a ball straight down from an apartment balcony to the ground below. Find the height of the balcony
A 1.10 kg mass is at the center of a uniform spherical shell of mass 1.09 1020 kg and radius 1.05 106 m. Find the resultant gravitational force on the mass
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