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Q1. Janet jumps off a high diving platform with a horizontal velocity of 1.55 m/s and lands in the water 1s later.
How high is the platform? The acceleration of gravity is 9.80 m/s2.
Reply in units of m
Q2. A bullet is fired straight up from a gun with a muzzle velocity of 259 m/s.
Neglecting air resistance, what will be its displacement after 7.6 s? The acceleration of gravity is 9.8 m/s2.
The wind blows with a force of 425N north on a sail boat, while the water exerts a force of 325N west on the sailboat. Find out the magnitude and direction of the net external force on the sailboat.
Modeling the optical trap as a Hookean spring, evaluate the trap stiffness using the Boltzmann distribution. Determine the sphere diameter by comparing the Stokes drag and the tweezer force that balances the drag.
You bring a 350-g wrench into the house from your car. The house is 15 C warmer than the car, and it takes 2.52 kJ of energy to warm the wrench by this amount. Find (a) heat capacity of the wrench and (b) specic heat of the metal it's made from.
Bob, of mass m, drops from a tree limb at the same time that Esther, also of mass m, begins her descent down a frictionless slide. If they both start at the same height above the ground, which is true about their kinetic energies as they reach the gr..
Find the distance from the positive plate
Find out the least compression of the spring
The parallel metal plate of a capacitor is detached by a distance of 0.5cm and is connected to a 90v battery. Find the electric field between them and surface charge density on the plate.
A box of mass 15 kg is dragged by a 50 N horizontal force a distance of 10 m over a rough surface with the coefficient of friction = 0.14 the work done by friction force.
The change in the kinetic energy of the system
Two 18 cm diameter charged disks face each other, 25 cm apart. Both disks are charged to - 30 nC. What is the electric field strength at the midpoint between two disks.
The flywheel of an engine has a moment of inertia 2.50 about its rotation axis. What constant torque is required to bring it up to the angular speed of 390 in a time of 8.50, starting from rest? What is its last kinetic energy . Discover an angular..
The diodes are oppositely oriented, so that when one diode is forward-biased, the other is back-biased. Which phrase best describes the current in the circuit.
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