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A driver in a car traveling at a speed of 56.0 mi/h sees a deer 116 m away on the road. Calculate the minimum constant acceleration that is necessary for the car to stop without hitting the deer (a
A cloud that is about to unleash a lightning bolt has a charge of +24 coulombs. In stormy weather, powerful updrafts of air carry electrons from one place in the storm system to another. If the clo
A sound wave in air has a frequency of 294 Hz and travels with a speed of 343 m/s. How far apart are the wave crests (compressions)?
The difference in potential between the ac- celerating plates of a TV set is about 26 kV. The distance between these plates is 1.7 cm. Find the magnitude of the uniform electric field in this regio
Four particles with charges of 8.9 μC, 3.9 μC, 1.6 μC and -11 μC are placed at the corners of a "4.2 m × 4.2 m" square. The acceleration of gravity is 9.81 m/s2 and the value of Co
Find the maximum height reached by the camera with respect to the ground. The acceleration of gravity is 9.8 m/s^2.
Two identical aluminum objects are insulated from their surroundings. Object A has a net charge of excess eletrons. Object B is grounded. Which object is at a higher potential?
During the acceleration, what is the force on the boat and trailer? (A positive force means a force in the direction of motion.)
Find the magnitude of the normal force exerted on the crane by the ground while the wrecking ball is moving upward at a constant speed of v = 1.49 m/s.
A car has mass M = 1200 kg, and the driver has mass m = 70 kg. The car is initally traveling at 15 m/s. Then the driver steps on the brakes, and the car stops in 4 seconds. Calculate the force on th
An electron with a speed of 3.28 × 108 cm/s in the positive direction of an x axis enters an electric field of magnitude 1.26 × 103 N/C, traveling along a field line in the direction th
A gun shoots bullets that leave the muzzle with a speed of 346 m/s. If a bullet is to hit a target 116 m away at the level of the muzzle, the gun must be aimed at a point above the target. How far
To win the game, a place kicker must kick a football from a point 22m from the goal and the ball must clear the crossbar, which is 3.05m high. When kicked, the ball leaves the ground with a speed of
To determine freefall acceleration on a moon with no atmosphere, you drop your handkerchief off the roof of a baseball stadium there. The roof is 113 meters tall. The handkerchief reaches the ground
The length of a string is 300 cm. It is held ?xed at each end. The string vibrates in two sections; i.e., the string has two antinodes, and the string vibrates at 140 Hz. Find the wavelength.
What is the magnitude and direction of the car's acceleration as it slows down?
Leroy, who has a mass of 120 kg, is skateboarding at 9.0 m/s when he smacks into a brick wall and comes to a dead stop in 0.2 s. (a) What is the deceleration?
A weightlifter raises a weight with an acceleration of 2 m/s2. If the net force exerted on the weight is 316 N, what is its mass?
A capacitor has a charge of 36 μC. The potential difference between the conductors is 400 V. What is the capacitance? Answer in units of nF. Please show all work on how to solve this problem to
A cannonball shot with an initial velocity of 140 m/s at an angle of 60° follows a parabolic path and hits a balloon at the top of its trajectory. Neglecting air resistance, how fast is the can
A charge of 5.42 μC is at the origin and a second charge of -2.54 μC is on the positive x-axis 1.00 m from the origin. Find the magnitude of the electric field at a point P on the y-axis 0.58
An object with mass 3.0 kg is attached to a spring with spring stiffness constant and is executing simple harmonic motion. When the object is 0.020 m from its equilibrium position, it is moving wit
The pulley system shown in the figure is used to lift a 61kg crate. Note that one chain connects the upper pulley to the ceiling and a second chain connects the lower pulley to the crate. The crate
A 218-kg log is pulled up a ramp by means of a rope that is parallel to the surface of the ramp. The ramp is inclined at 30.0° with respect to the horizontal. The coefficient of kinetic frictio
You hang the rod vertically and attach a 231 kg mass to the bottom, and you observe that the bar becomes 1.41 cm longer. Calculate the effective stiffness of the interatomic bond, modeled as a "spri