A boat crosses a 60 meter river with a current of 0.9 m/s. The boat can travel 1.4 m/s in still water. The boat points it bow (front) 30o upstream into the current.. A. Determine the X &Y components of the boat’s velocity.
B. How long will it take the boat to cross the river?
C. Where will the boat reach the other side of the river relative to the boats point of origin?
D. What is the relative magnitude and direction of the velocity of the boat from its point of origin?

Three different objects, all with different masses, are initially at rest at the bottom of a set of steps. each step is of uniform height . the mass of each object is a multiple of the base mass : object 1 has mass 4..00m , object 2 has mass 1..96m , and object 3 has mass . when the objects are at the bottom of the steps, define the total gravitational potential energy of the three-object system to be zero. if the objects are then relocated as shown, what is the new total potential energy of the system? each answer requires the numerical coefficient to an algebraic expression. each algebraic expression is given using some combination of the variables , , and , where is the acceleration due to gravity. enter only the numerical coefficient. (example: if the answer is 1..23mgd , just enter 1.23)

The force it would take to accelerate an 900-kg car at the rate of 6m/s2

Abeverage can is made of 3004-h19 aluminum alloy (elastic modulus 69 gpa, tensile yield strength 285 mpa, density 2.72 g/cm^3). the dimensions on the can are approximated as a thin-walled cylinder with a height of 4.83 inches, diameter of 2.60 inches. empty the can has a mass of 14.2 g. determine: a. the wall thickness of the cylinder b. assuming a pinned-pinned condition what is the critical load? c. assuming a fixed-fixed condition what is the critical load?