in the diagram below a 1kg mass on a rough horizontal surface is joined to a 2kg mass by a light Intensible string running over a frictionless pulley. coefficient kinetic friction acting between the 1kg mass and the surface when 2kg mass accelerates downwards at 2m /s ² is

Aman tries to push a box of mass 4 kg with a force of 5 n but the box remains stationary if the coefficient of static friction is 0.45, what is the value of the maximum force of friction?

A500g object falls off a cliff and losers 100 j from its gravitational potential energy store. if the gravitational field strength g=9.8n/kg, how high is the cliff?

Engineers find a new metal that is stronger than steel but much lighter. this material is also significantly cheaper than what is currently used for most aircraft, available in large quantities, and easy to manufacture. the engineers are excited because this new material will lower the costs of buying and operating airplanes for companies. what is probably the best step for the engineers to make next?