A car of mass 2000 kg is moving with a velocity of 20 m/s and is acted upon by a forward force of 2000 N due to engine and delaying force of 1000 N due to friction. Find its velocity after 20 seconds.

The us government wants to allocate billions of dollars in the next 10 years to assure our future energy security. the funds will be spread among a variety of possible energy resources. where do you think the government should put the greatest support: solar energy, wind energy, clean coal, oil exploration, gas exploration, or a combination of sources? are there other efforts that should be explored? support your position with cited information for both questions.

The of a machine determines its "usefulness." a. input force b. output force c. mechanical advantage

The 5-kg cylinder is initially at rest when it is placed in contact with the wall b and the rotor at a. if the rotor always maintains a constant clockwise angular velocity v = 6 rad> s, determine the initial angular acceleration of the cylinder. the coefficient of kinetic friction at the contacting surfaces b and c is mk = 0.2.