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An object has a kinetic energy of 322 J and a momentum of magnitude 26.7 kg·m/s. Find the speed and the mass of the object.
If a mass m=.2kg is tied to one end of a spring whose force constant k =80 N/m and whose other end is held fixed what are the angular frequency w the frequency f and period t of its oscillation? If
Two horizontal forces, 236 N and 143 N, are exerted on a canoe. If the these forces are applied in the same directions, find the net horizontal force on the crate
An object weighing 320 N in air is immersed in water after being tied to a string connected to a balance. The scale now reads 250 N. Immersed in oil, the object weighs 290 N. Find the density of the
The leg and cast in the figure below weigh 300 N, with the center of mass as indicated by the blue arrow in the diagram. The counterbalance w1 weighs 135 N. Determine the weight w2 and the angle &al
A 0.360 kg croquet ball makes an elastic head-on collision with a second ball initially at rest. The second ball moves off with half the original speed of the first ball. What is the mass of the sec
A thin brass ring has inner diameter 5.40000cm at 20 celcius and a solid steel rod has outer diameter 5.50050cm at 20 celcius. To what temperature must both be raised so that the brass ring will sli
How long does it take an automobile traveling in the left lane of a highway at 60.0 mi/h to overtake another car that is traveling in the right lane at 40.0 mi/h when the car's front bumpers are ini
Two horizontal forces, 315 N and 145 N are applied to a sled resting on a frictionless skating rink. If they are applied in the same direction, what is the net horizontal force on the sled?
A 0.430- block is attached to a horizontal spring that is at its equilibrium length, and whose force constant is 20.0 . The block rests on a frictionless surface. A 6.00×10-2- wad of putty is
The displacement vector for a 15.0 second interval of a jet airplane's flight is (2150, -2430) m. (a) What is the magnitude of the average velocity?
Assume that there is no friction between the sleds' runners and the snow surface. What is the tension in the rope that he is pulling?
A firefighter of mass 95 kg slides down a vertical pole with an acceleration of 4 m/s2. What is the friction force that acts on the firefighter?
Starting from rest, a boat increases its speed to 3.56 m/s with constant acceleration. (a) What is the boat's average speed?
The temperature at 20 Km is 216 K and the surface is 288K. Assume that the balloon rises slowly so that the temperature inside is the same as outside. What will happen if the balloon is made up of r
A 6500 kg helicopter accelerates upward at 0.60 m/s^2 while lifting a 1200 kg car. The car is suspended beneath the helicopter by a steel cable. What is the lift force exerted on the air by the heli
A 10.0 g object moving to the right at 21.0 cm/s makes an elastic head-on collision with a 15.0 g object moving in the opposite direction at 32.0 cm/s. Find the velocity of each object after the co
To give a 21- child a ride, two teenagers pull on a 3.9- sled with ropes, as indicated in the figure . Both teenagers pull with a force of 55 at an angle of 35 relative to the forward direction, whi
A woman is pushing a piano up a ram at aconstant velocity that is 30 degrees above the horizon. the piano is 200 kg. the force she is applying is parralell to the Friction free incline
A loudspeaker of mass 19.0 kg is suspended a distance of h = 2.00m below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of l= 3.50m . What is the tension
A person can survive a feet-first impact at a speed of about 12m/s (27 m/h) on concrete; 15 m/s (34 m/h) on soil; and 34 m/s (76 m/h) on water. Why the different values for different surfaces?
A 2300 kg car moving east at 10.0 m/s collides with a 3000 kg car moving north. The cars stick together and move as a unit after the collision, at an angle of 47.0° north of east and at a speed
An isolated conducting sphere has a 14 cm radius. One wire carries a current of 1.0000048 A into it while another wire carries a current of 1.0000000 A out of it. How long in seconds would it take f
Assuming that the door's center of gravity is at its center, find the horizontal components of force exerted on the door by each hinge.
Conducting rod is pulled horizontally with constant force F= 4.30 N along a set of rails separated by d= 0.480 m. A uniform magnetic field B= 0.800 T is directed into the page. There is no friction