A cart loaded with bricks has a total mass of 12.7 kg and is pulled at constant speed by
a rope. The rope is inclined at 22.5◦
above the horizontal and the cart moves 30.7 m on
a horizontal floor. The coefficient of kinetic
friction between ground and cart is 0.7
The acceleration of gravity is 9.8 m/s
2-How much work is done on the cart by the
rope?

The x-coordinate of a particle in curvilinear motion is given by x = 3.1t3 - 4.9t where x is in feet and t is in seconds. the y-component of acceleration in feet per second squared is given by ay = 2.3t. if the particle has y-components y = 0 and vy = 5.0 ft/sec when t = 0, find the magnitudes of the velocity v and acceleration a when t = 1.8 sec. sketch the path for the first 1.8 seconds of motion, and show the velocity and acceleration vectors for t = 1.8 sec. answers: v = ft/sec a = ft/sec2

Erosion of the beach is normally a slow process. however, in certain situations, large chunks of shore may wash out to sea. what could cause this to happen?

Afrequency generator sends a 550 hz sound wave through both water and ice. what is the difference in wavelength between the wave produced in ice and the wave produced in water?