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In baseball, the rules specify that the ball is 23.1 in circumference with a mass of 141 . (These numbers can vary slightly.) If a pitcher throws a fastball at 31.0 , its spin typically can be 24.0
A 70.0 kg astronaut pushed to the left of a spacecraft with a force F in gravity free space, The spacecraft has a total mass of 1.0 x 10(4)kg. During the push, the astronaut accelerates to the right
A train moving at a constant speed of 56.0 km/h moves east for 31.0 min, then in a direction 43.0° east of due north for 17.0 min, and then west for 79.0 min. What is the average velocity of th
The rod is released from an angle 1= 63.0o, and moves through its horizontal position at (B) and up to (C) where it stops with 2 = 109.0o, and then falls back down. Friction at the pivot is negligib
A force of 5 pounds is required to hold a spring stretched 0.3 feet beyond its natural length. How much work (in foot-pounds) is done in stretching the spring from its natural length to 0.9 feet bey
Two horizontal forces, 235 N and 183 N, are exerted on a canoe. If the these forces are applied in the same directions, find the net horizontal force on the crate.
On an amusement park ride, passengers are seated in a horizontal circle of radius 7.5m. The seats begin from rest and are uniformly accelerated for 21 seconds to a maximum rotational speed of 1.4 r
A child of mass 40.0 kg is sitting on a horizontal seesaw at a distance of 1.7 m from the supporting axis. What is the magnitude of the torque about the axis due to the weight of the child?
A railroad car of mass 3.00 104 kg moving at 2.50 m/s collides and couples with two coupled railroad cars, each of the same mass as the single car and moving in the same direction at 1.20 m/s
It is 150 cm from your eyes to your toes. You're standing 196 cm in front of a tall mirror. How far is it from your eyes to the image of your toes?
A 47.0 g golf ball is driven from the tee with an initial speed of 54.0 m/s and rises to a height of 23.2 m. a(a) Neglect air resistance and determine the kinetic energy of the ball at its highest poi
the maximum deceleration of your car is 12 ms^2. A. How much distance is between you and the deer when you come to a stop? B. What is the maximum speed you could have and still not hit the deer?
A speedboat moving at 32.0 m/s approaches a no-wake buoy marker 100 m ahead. How long does it take the boat to reach the buoy?
Assume that the springs have somehow not yet compressed to their maximum amount. How much are the springs compressed?
A pig slides down a 13.0 ° incline in twice the time it would take to slide down a frictionless 13.0 ° incline. What is the coefficient of kinetic friction between the pig and the incline?
Starting from rest a boat increases its speed to 4.17 m/s with constant acceleration. What is the boats average speed? If it takes the boat 4.7 s to reach this speed, how far has it travelled?
A 3.85 102 g glass coffee cup is at room temperature, 20.0°C. It is then plunged into hot dishwater, 82.0°C. If the temperature of the cup reaches that of the dishwater, how much heat does t
A 45.0 kg person, standing 1.3 m from the axis, begins to run on the disk in a circular path and has a tangential speed of 2.80 m/s relative to the ground. Find the resulting angular speed of the di
Observers on the planet see the probe approaching at a speed of 0.67c. What is the speed of the probe as measured from the spaceship?
What is the terminal speed for an 78.0 skier going down a 43.0 snow-covered slope on wooden skis = 0.060?
if a football is kicked at a 30 degree angle and traveling 19 meters per second, what is the hang time of the football?
A 20.8 kg floodlight in a park is supported at the end of a horizontal beam of negligible mass that is hinged to a pole, as shown in the figure below. A cable at an angle of α=32.4° with t
A planet's moon travels in an approximately circular orbit of radius 5.0 107 m with a period of 6 h 19 min. Calculate the mass of the planet from this information.
A smooth cylinder of radius=10cm resting on a horizontal surface supports a bar AB of length 30cm which is hinged at A. The weight of the bar is 50N. The cylinder is kept from rolling away by a str
The jet is traveling at 45.0 m/s when the pilot receives the message. What is the acceleration of the plane if it takes the pilot 5.00 s to bring the plane to a halt?