A box of mass m = 19.5 kg m=19.5 kg is pulled up a ramp that is inclined at an angle θ = 23.0 ∘ θ=23.0∘ angle with respect to the horizontal. The coefficient of kinetic friction between the box and the ramp is μ k = 0.335 μk=0.335 , and the rope pulling the box is parallel to the ramp. If the box accelerates up the ramp at a rate of a = 2.69 m/s 2 a=2.69 m/s2 , calculate the tension F T FT in the rope. Use g = 9.81 m/s 2 g=9.81 m/s2 for the acceleration due to gravity.

When you drop a pebble from height a it reaches the ground with speed v if there is no air resistance. from what height should you drop it so it will reach the ground with three times the speed? (a) 9m (b) 3m (c) 6m (d) 18m

Acave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. the lift is performed in three stages, each requiring a vertical distance of 11.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.80 m/s; (b) he is then lifted at the constant speed of 4.80 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 78.0 kg rescue by the force lifting him during each stage

High schoolphysics 5+3 pts a neon light consists of a glass tube with metal wires at each end. when connected to a high-voltage source, the gas glows. if a fly lands on the glass tube, what will most likely happen? a) the fly will not feel a shock because the glass conducts any free electrons back into the gas. b) electrons will flow directly from the metal wires along the glass and shock the fly. c) the fly will not feel a shock because the glass insulates it from the electrons in the gas and the metal. d) electrons that are moving through the gas will be conducted through the glass and shock the fly.