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Q1. Megan's mass is 30 kg. She climbs the 4.8 m ladder of a slide and reaches a velocity of 2.8 m/s at the bottom of the slide. How much work was done by friction on Megan? Imagine that air resistance is negligible.
Q2. Two horizontal forces, 249 N and 165 N, are exerted in opposite directions on a crate. What is the net horizontal force on the create? Be sure to point to the direction of the net force.
A girl of mass m 1 =60 m_1 = 60 kilograms springs from a trampoline with an initial upward velocity of v i =8.0 v_i = 8.0 meters per second, What is height max with respect to the top of the trampoline
A 25 g of copper pellets are removed from a 300 C oven and immediately dropped into 120 mL of water at 18 C in an insulated cup. What will the new water temperature be.
A round pipe of varying diameter carries petroleum from a wellhead to a refinery. At the wellhead the pipe\'s diameter is 50.5 cm, what is the pipe\'s diameter at the refinery
A small radio operates on 3.00 V and has a resistance of 15 coulomb. At what rate does the radio use electric energy.
A hoop and a disk, both of 0.76- m radius and 3.0- kg mass, are released from the top of an inclined plane 3.0 m high and 7.0 m long. determine the speet of the hoop and disk
When an object is 15.5cm from a lens, an image is formed 14cm. from the lens on the same side as the object. Is it erect or inverted
A metal sphere centered at the origin has a surface charge density that has a magnitude of 24.1 nC/m2 and a radius less than 2.00 m. What is the sign of the charge on the sphere
Calculate the smallest coefficient of static friction necessary for mass A to remain stationary.
A rectangular container measuring 23 cm 51 cm 65 cm is filled with water. What is the mass of this volume of water in kilograms and grams.
Consider a balloon containing nitrogen molecules at room temperature (20°C) and atmospheric pressure. what is the number of molecules in the balloon
Loretta travels by car from one city to another with different constant speeds between pairs of cities. Find the distance between two cities
A small but measurable current of 8.4 x 10-10 A exists in a copper wire whose diameter is 2.9 mm. calculate the current density and electron drift speed
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