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On her way to visit Grandmother, Red Riding Hood sat down to rest and placed her 1.2 kg basket of goodies beside her. A wolf came along, spotted the basket, and began to pull on the handle with a force of 6.4 N at an angle of 25o with respect to the vertical. Red was not going to let go easily, so she pulled on the handle with a force of 12 N.
a) If the net force on the basket is straight up, at what angle was Red Riding Hood pulling?
b) What is the acceleration of the basket?
A river flows due south with a speed of 2.30 . A man steers a motorboat across the river; his velocity relative to the water is 4.40. What is the velocity of the boat relative to the earth
An aluminum cup contains 225 g of water and a 40-g copper stirrer, all at 27 °C. A 500-g sample of silver at an initial temperature of 87 °C is placed in the water. Calculate the mass of the aluminum cup
A string of a violin is 32 cm long between fixed points with a fundamental frequency of 440 Hz and a mass per unit length of 7.2 x 10-4 kg/m. What are the wave speed and the tension in the string
A golf ball with a coefficient of restitution of 0.78 is tossed horizontally at 0.9 m/s from a height 1.5 m above the level ground. What is the maximum height of the first bounce of the golf ball
A toy rocket starts at rest, and is fired vertically. The fuel burns for tine t1 = 15.7 s, and the rocket rises with a constant net upward acceleration of magnitude a1 = 7.23 m/s2. calculate the total time the rocket is in the air
What is the force on a test charge Q at the center.
Four people with a combined mass of 300kg are riding in a 1100kg car. When they drive down a washboard road with bumps spaced 5.1m apart, How much does the car rise up on its springs
A tank circuit in a radio transmitter is a series RCL circuit connected to an antenna. The antenna broadcasts radio signals at the resonant frequency of the tank circuit. determine the maximum inductance of the tank circuit
The starter motor of a car engine draws a current of 160A from the battery. The copper wire to the motor is 4.80mm in diameter and 1.2 m long. How much charge passes through the starter motor
A square coil of wire with 17 turns is in a magnetic field of 0.11 T. Find the area of one turn if the field is perpendicular to the plane of the coil
A closed system is observed to have 17 objects in it. Initially, the total energy of the system is 4714 J. After 1.7 h have passed, how much total energy will the system contain
What is the internal resistance of an automobile battery that has an emf of 12.0 V and a terminal voltage of 16.5 V while a current of 7.50 A is charging it
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