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At the start of his race, an 84-kg runner pushes against the starting block, Determine the horizontal speed of the runner after the force is exerted for 0.32s
An underwater scuba diver sees the Sun at an apparent angle of 45.0° above the horizon. What is the actual elevation angle of the Sun
In outer space a rock of mass 12 kg is acted on by a constant net force ‹ 30, ?14, 49 › N during a 3 s time interval. What was the rock's velocity at the beginning of the time interval
A person exerts a force of 120N on a rope that pulls a sled across a very smooth surface. The rope is oriented 37 degrees above the horizontal. Determine the speed of the sled after moving for 10 m
The speed of a projectile when it reaches its maximum height is 0.39 times its speed when it is at half its maximum height
A 78-kg person in a moving car stops during a car collision in a distance of 0.78m, Determine the speed of the person before the air bag opens up
An electron has an initial velocity of 1.00 ? 106 m/s in a uniform 9.00 ? 105 N/C strength electric field. What is the direction of the electric field
The Lunar Lander of mass 1.9Ã?104kg made the last 150m of its trip to the Moon's surface in 120s, determine the upword force required to decend at a constant speed
A 0.15-kg apple falls off a tree branch that is 2.8m above the grass. The apple sinks 0.066m into the grass while stopping
What does it means when I say that a light truck and a heavy truck have the same momentum, What is renewable energy
A box is lifted with a pry bar , by slipping the bar under the box and lifting up on the bar. what is the size of the force required to lift the box
The downward acceleration of a 74-kg stuntwoman near the end of a fall from a very high building is 5.5m/s2
A 45.0 g ball of copper has a net charge of 2.1 µC. What fraction of the copper's electrons have been removed
A ford focus has a wheelbase of 274cm. Upon weighing, it is found that the front wheels have a weight of 7000 N, What is the weight of the vehicle
A train is moving parallel and adjacent to a highway with a constant speed of 33 m/s. What is the speed of the car just as it passes the train
A proton that has a mass m and is moving at 390 m/s in the + direction undergoes a head-on elastic collision with a stationary oxygen nucleus of mass 16m
If a current of 80.0 mA exists in a metal wire, In what direction do the electrons travel with respect to the current
Standing at a crosswalk, you hear a frequency of 500 Hz from a siren of an approaching ambulance. Determine the ambulance's speed from these observations
Tension is maintained in a string. The observed wave speed is v=22.0 m/s when the suspended mass is m=3.00 kg. What is the mass per unit length of the string
You spin an object around so that it moves in a horizontal circle with 2.00 m radius at a speed of 2.5m/s, What is the angular speed of the object
A 54-kg skater initially at rest throws a 3.0-kg medicine ball horizontally to the left. Determine the acceleration of the ball during the throw
Light of wavelength 540.00 nm is incident normally on a diffraction grating, How many slits/mm are marked on the grating
A weight of 45.0 N is suspended from a spring that has a force constant of 180 N/m. Determine the maximum value of the driving force
A 2.30-kg object attached to a spring moves without friction (b = 0) and is driven by an external force given by the expression F = 3.50sin(2(3.14)t), Find the angular frequency of the driven system
A 3.90-kg object is attached to a spring and placed on frictionless, horizontal surface. Find the total energy of the oscillating system