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Q. A person stands on a scale in an elevator. As the elevator starts, the scale has a constant reading of 592 N. As the elevator later stops, the scale reading is 386 N. Assume the magnitude of the acceleration is the same during starting and stopping.
Q. A 28 kg block is connected to an empty 1 kg bucket by a cord running over a frictionless pulley. The coefficient of static friction between the table and te block is .465 and the coefficient of kinetic friction between the tabel and the block is .320. Sand is gradually added to the bucket until the system just begins to move. Calculate the meass of sand added to the bucket. Calculate the acceleration of the system.
The position of a cart that is oscillating on a spring is given by the equation x= 12.3 cm cos [(1.26 s-1)t] . When t= .805s , what are the (a) velocity and (b) acceleration of the cart ?
Find out the angle the string makes with the vertical.what is the maximum voltage that can be applied across the whole network.
Show that the horizontal resultant of these two forces on the lamp is zero. Work out the weight of the lamp.
A gun is fired vertically into a 2.00 kg block of wood at rest straight above it. If the bullet has a mass of 21.0 g and a speed of 198 m/s, how high would the block rise into the air after the bullet becomes embedded in it.
Two charged bodies exert the force of 0.185N on each other. If they are moved so that they are one-fourth as far apart, what force is exerted.
The stairs are 83 long and inclined at the angle of 31. If a player has a mass of 87, estimate his average power output on the way up. Overlook friction and air resistance.
The origin of the coordinate system and with a label at their heads. Two of these vectors are given in terms of the unit-vectors I and j as
What is the tangential acceleration of a bug on the rim of a 13.0-in.-diameter disk if the disk accelerates uniformly from rest to the angular speed of 76.0 rev/min in 3.50 s.
Calculate the induced emf in the conductor and if the total resistance in the conductor is R what is the magnitude of the induced current.
What is Newtons Version of Keplers Third Law
Define proton-proton chain efficiently
Explain the spacing between allowed vibrational energy levels
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