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2. Bob throws a 500 g rock at 25 m/s, moving his hand through 1.0 m as he accelerates it from rest. If Bob is standing on ice, he will slide backwards. Bob's mass is 75 kg. Solve this question in two ways:
a) Write Newton's 2nd Law for Bob and the rock. Use kinematics to get the rock's acceleration.
A loudspeaker in a parked car is producing sound whose frequency is 20680 Hz, what is the minimum speed of the moving car
While John is travelling along a straight interstate highway he notices that the mile marker reads 243 km john travels until he reaches his path to the 178 km marker what is john's resultant displacement from the 243 km marker.
One end of a horizontal rope is attached to a prong of an electrically driven tuning fork that vibrates at a frequency 125Hz, What is the speed of a transverse wave on the rope
Sunlight falls on two Polaroids. If 31% of the light intensity is transmitted. What is the angle between the polarization axes of the two Polaroids
The skis have a thrust of 190 . Sam's speed at the bottom is 35.0 . Illustrate what is the coefficient of kinetic friction of his skis on snow?
An electron moves into a uniform magnetic field B = 0.182mT with initial speed with v = 12000m/s, What is the radius of the helical motion
Atomic physics, you begin with 227 over 89. Then there is an alpha decay, What isotope is left after EACH of the decays
A railroad car of mass 2.52 104 kg is moving with a speed of 4.06 m/s. It collides and couples with three other coupled railroad cars, How much mechanical energy is lost in the collision
assuming the average person has a mass of 68kg? Do not avoid the weight of the logs. Assume the specific gravity of wood is 0.6.
Two identical spheres are made of conducting material. Initially, sphere 1 has a net charge of 33Q and sphere 2 has a net charge of -18 Q
A screen 1-m wide is 2.0 m from a pair of slits illuminated by 633-nm laser light, with the screen's center on the center line of the slits. How many fringes will be visible on the screen
Suppose that you have two identical capacitors and a single resistor. If you make an RC circuit with one capacitor, What is the time constant for this circuit
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