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Player serves a tennis ball 2.2 m above the ground. The ball leaves his racquet with a speed of 56 m/s at an angle 10 degree below the horizontal. what's the ball clea the net
A charged particle with a charge-to-mass ratio of |q|/m = 5.7 108 C/kg travels on a circular path that is perpendicular to a magnetic field whose magnitude is 0.75 T
An airplane with a speed of 73.9 m/s is climbing upward at an angle of 71.7 ° with respect to the horizontal. When the plane's altitude is 555 m, determine the angle of the velocity vector of th
A helicopter flies over the arctic ice pack at a constant altitude, towing an airborne 126-kg laser sensor which measures the thickness of the ice, find the tension in the cable towing the sensor
Two bicycle tires are set rolling with the same initial speed of 3.30m/s along a long, straight road, What is the coefficient of rolling friction for the tire under low pressure
A 2kg mass is loaded into a spring cannon. The cannon's spring has a constant k = 4000 abd the spring is compressed 0.8m. How far does it move before it comes to a stop
A laser emits a narrow beam of light. The radius of the beam is 1.0 mm, and the power is 2.8 mW. What is the intensity of the laser beam
When we look at a particular star, we are seeing it as it was 878 years ago. How far away from us (in meters) is the star
In a dentist's office an X-ray of a tooth is taken using X-rays that have a frequency of 7.60 × 1018 Hz. What is the wavelength in vacuum of these X-rays
Intelligent beings in a distant galaxy send a signal to earth in the form of an electromagnetic wave. What is the speed vrel of the galaxy relative to the earth
On average, an electric water heater operates for 2.3 h each day. what is the cost of operating the heater
Two 0.70m -long pendulums hang side by side. The masses of the pendulum bobs are 55g and 65g. To what height does the heavier bob rebound
A 1130kg car and 4020kg truck undergo a perfectly inelastic collision. Find the velocity of the wreckage immediately after the collision
A battery labeled 12.0 V supplies 1.63 A to a 5.5 resistor, What is the terminal voltage of the battery
The earth's magnetic field, like any magnetic field, stores energy. The maximum strength of the earth's field is about 7.0 10-5 T. Find the maximum magnetic energy stored in the space
Using a block of transparent, unknown material, What is the index of refraction of this material
A 1.00 kg block is sitting on the top og a 10.0kg cart that is free to move on a horizontal surface. What is the maximum horizontal acceleration the cart can have
A 1053-kg car starts from rest at the bottom of a drive way and has a speed of 3.00 m/s at a point where the drive way has risen a vertical height of 0.600 m. How much work does the engine do
A sports utility vehicle has tires which are 110 cm in diameter. If the wheel is rotated through 30 revolutions, how far forward does a point on the tire travel
One of the events in the Scottish Highland Games is the sheaf toss, in which a 7.92-kg bag of hay is tossed straight up into the air using a pitchfork. Using the total impulse produced by gravity, d
Earth is about 150 trillion meters from the Sun, while Mars is about 230 trillion meters from the Sun. What is the gravitational force between Mars and Earth
A box weighing 200 N is dragged across a gravel surface with an applied force of 100 N. What is the net forward force on the box
What is the magnitude of the acceleration of a falling sky diver (mass 62.5kg including parachute) who has opened her parachute
The Wall of Death in an amusement park is comprised of a vertical cylinder that can spin around the vertical axis. Find the tangential velocity of the spinning wall
You know your mass is 62kg , but when you stand on a bathroom scale in an elevator, it says your mass is 90kg. What is the acceleration of the elevator