Aforce f = 73.6 n i + 60.0 n j is applied to a 12.3-kg cart on a level frictionless floor [x-horizontal, y-vertical directions]. the cart starts from rest and moves horizontally along the floor due to this force. what is the cart's instantaneous velocity (m/s) when it is moved by 8.61 m?

Aspring has a natural length of 8 m. if a 12-n force is required to keep it stretched to a length of 10 m, how much work w is required to stretch it from 8 m to 16 m? (round your answer to two decimal places.)

The temperature in gavin's oven is a sinusoidal function of time. gavin sets his oven so that it has a maximum temperature of 280°f and a minimum temperature of 240°. once the temperature hits 280°, it takes 20 minutes before it is 280° again. gavin's cake needs to be in the oven for 30 minutes at temperatures at or above 270°. he puts the cake into the oven when it is at 260° and rising. how long will gavin need to leave the cake in the oven? (round your answer to the nearest minute.)

You notice the birds sitting on the electrical wires which of the following explain why the birds don't get shocked