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A 2500 kg truck travelling north at43 km/h turns east and accelerates to 56 km/h.
1. What is the change in the truck's kinetic energy?
2. What is the magnitude of the change in the linear momentum of the truck?
3. What is the direction of the change in the linear momentum of the truck?
Three sisters go skiing. Each has a mass of m = 50 kg. There are three different routes to the bottom. How fast is each sister going when she reaches the bottom
A car with good tires on a dry road can decelerate at about 5.0 m/s2 when braking. Suppose a car is initially traveling at 55 mi/h. (a.) How much time does it take the car to stop.
Two sound sources radiating in phase at a frequency of 485 Hz interfere such that maxima are heard at angles of 0 and 22° from a line perpendicular to that joining the two sources. Find out the separation between the two sources.
q1. a man pulls a crate of mass 75.0 kg across a level floor. he pulls with a force of 180.0 n at an angle of 26.0deg
Mars has a small moon, Phobos, that orbits with a period of 7 h 39 min. What is the mass of Mars
Illustrate what is the average force exerted on the ball by the bat? Neglect the weight of the bat, since it is so much less than the force of the bat. Choose the direction of the incoming ball as the positive direction.
A hoop and a disk, both of 0.66- m radius and 4.0- kg mass,are released from the top of an inclined plane 3.1 m high and 8.9 mlong. What is the speed of each when it reaches the bottom? Assume that they both roll without slipping.
A boat moves relative to water with a velocity which is n =2 times less than the river flow velocity. At what angle to the stream direction should the boat move to minimize drifting.
A spring-loaded gun, fired vertically, shoots a marble 9.2 straight up in the air. What is the marble's range if it is fired horizontally from 2.3 above the ground
A contact lens is made of plastic by an index of refraction of 1.48. The lens has an outer radius of curvature of +1.90 cm and an inner radius of curvature of+2.59 cm. What is the focal length of the lens?
A ball of mass 0.65 kg is fired with velocity 120 m/s into the barrel of a spring gun of mass 2.4 kg initially at rest on a frictionless surface. What fraction of the ball's initial kinetic energy is stored in the spring
Three uniform spheres are located at the corners of an equilateral triangle. Each side of the triangle has a length of 1.00 m. compute the magnitude of the initial acceleration of the third sphere
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