a hotel guest starts to pull an armchair across a horizontal floor by exerting a force of 91 N (15 DEGREES ABOVE HORIZONTAL). The normal force exerted by the floor on the chair is 221 N. The acceleration is 0.076 meter/second^2(fwd). determine the mass of the chair.
the answer is 25 kg but i...
1) Jim decides to jump a gorge on his skateboard. The gorge is 50 m wide and jim has constructed a 1 m high ramp iclined at 30 degrees to the horizontal. If air resistance is neglected, calculate what speed Bart must reach if he is to land safely on the other side of the gorge.
The answer is...