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A 45.0 kilogram schoolgirl is standing on a 135 kilogram plank. The plank is originally at rest, is free to slide on a frozen lake, which is a flat, frictionless surface. The girl begins to walk along the plank at a fix velocity of 1.52 m/s relative to the plank.
(a) Compute her velocity relative to the surface of ice?
(b) Compute the velocity of the plank relative to the surface of ice?
an elementary particle of mass m completely absorbs a photon after which its mass is 1.01m.a what was the energy of the
A 3.0-m-long ladder, as shown in Figure 12.39, leans against a frictionless wall. The coefficient of static friction among the ladder and the floor is 0.40. What is the minimum angle the ladder can make by the floor without slipping?
A ball of mass m and another ball of mass 3m are placed inside a smooth metal tube with a massless spring compressed between them. With what speed does the lighter ball emerge from the other end
A hockey puck moving at 34m/s slams through a wall of snow 40cm thick. It emerges moving at 17m/s. find the time the puck spends in the snow
The magnetic flux that passes through one turn of a 18-turn coil of wire changes to 5.0 Wb from 14.0 Wb in a time of 0.020 s. What is the resistance of the wire
After falling from rest from a height of 31 m, a 0.51-kg ball rebounds upward, reaching a height of 21 m. what average force was exerted on the ball
An 78.3 centimeter long pendulum with a 0.516 kilogram bob is released from rest at an initial angle of θ0 with the vertical. At the bottom of the swing, Find what angle does the pendulum make with the vertical
a bridge is made with segments of concrete 94 m long at the original temperature. if the linear expansion coefficient
If a hydrogen atom in its ground state is illuminated with em radiation of wavelength 97.44 nm, what is the highest state the electron can be promoted
the armature of a simple ac generator has 30 circular loops of wire each with a radius of 10 cm. it is rotated with a
a -58nC charge is distributed uniformly along the x-axis from x = -1.3 m to x = 3.4 m. Consider a point at y = 2.2 m on the y-axis. a) what is the x-component of the electric field at the point
The leg and the cast in Fig 4.20 below weigh 220 N (w1). Determine the weight w2 and the angle α needed so that no force is exerted on the hip joint by the leg plus the cast.
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