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2a) A 1.0 kg steel ball strikes a wall with a speed of 30 m/s at an angle of theta=37 with the normal to the ground. It bounces off with the same speed and angle, as shown in the figure below. If the ball is in contact with the wall for 0.20s, what is the magnitude of the average force exerted on the ball by the wall?
2b) a wheel rotating with a constant acceleration turns through 30 revolutions during a 5.0s time interval. Its angular velocity at the end of this interval in 30 rad/s. What is the angular acceleration of the wheel?
Two parallel plates have a capacitance of 1.0 µF when they are 1.0 mm apart. The plates are then fully charged by a 9.0 V battery, What is the constant electric field strength between the plates
Suppose that charges on a dipole antenna oscillate slowly at a rate of 1 cycle/s, What is the magnitude of the Poynting vector
Multiple Concept Example 4 and Interactive LearningWare 6.2 review the concepts that are important in this problem. What is the final speed of the probe
A rifle is aimed horizontally at a target 30 m away. The bullet hits the target 2.10 cm below the aiming point. What is the bullet's time of flight
A 645N woman climbs a staircase that rises at 50 degrees above the horizontal and is 4.95m long. Her speed is a constant 40.0cm/s. How much work has gravity done on her as she climbed the stairs
A wood log with a volume of 12 ft3 is submerged in water. Calculate the buoyant force (in Newtons) acting on the log
A circular loop of conducting wire is placed in a magnetic field of 0.45T while the free ends of the wire are attached to a 30ohm resistor. What are the magnitude and direction of the current in the resistor
Describe the interference of two wave pulses with different amplitudes if they are a) in phase and b) completely out of phase
Consider a series RLC circuit where R = 549 ? and C = 1.25 ?F. However, the inductance L of the inductor is unknown. To find its value, What is the inductance of the inductor in millihenrys
An arrow is placed 28.7 cm in front of a convex lens (f=15.0 cm). The convex lens is followed by a concave lens (f= 21.5 cm) 12.8 cm fro the convex lens. obtain the magnification of the image
rail car that weighs 43 N is accelerated at 8.9 m/s/s for 4.5 seconds. How much work is done on the rail car
A thin film of oil (n=1.26) is located on smooth, wet pavement. When viewed from a direction perpendicular to the pavement, evaluate the minimum thickness of the oil film
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