A 3.2 kg cannon ball at rest is fired from a cannon. The cannon ball leaves the cannon with a speed of 6.0 m/s. Determine the force provided by the cannon if it takes 0.55 seconds to launch the cannon ball
0 10,6 N
0 27,8 N
0 34 9 N
0 159 N

The car hoist allows the car to be driven onto the platform, after which the rear wheels are raised. if the loading from both rear wheels is 1380 lb, determine the force in the hydraulic cylinder ab. neglect the weight of the platform itself. member bcd is a right-angle bell crank pinned to the ramp at c. the force is positive if in tension, negative if in compression.

Polly is pushing a box across the floor with a force of 30 n. the force of gravity is –8 n, and the normal force is 8 n. which value could describe the force of friction if polly could not move the box?

5g of ammonium nitrate was dissolved in 60g of water in an insulated container. the temperature at the start of the reaction was 23.0°c and at the end it was 19.0°c. calculate the energy absorbed by the reaction.