Recent content by mms05

thank you all! :)

yes, i think so- but that wouldn't be the same as it being curved, because the displacement on a curved ramp would be different than that on a straight ramp, no?

oh my goodness- I'm so utterly confused... It's just not clicking :(!

so i don't have to use the radius of the circular (1/4) ramp at all??

A problem about work Hi! I need some help with this question: Jim rides his skateboard down a ramp that is in the shape of a quarter circle with a radius of 5.00 meters. At the bottom of the ramp, Jim is moving at 9.00 m/s. Jim and his skateboard have a mass of 65.0 kg How much work is done...

Thanks for the help- I really appreciate it!

lol, ok, nevermind, I got it. I just switched the sin and cos, right? I think I drew my vertical and force vectors wrong...

T2cos25-T1cos15= 0 T2sin25+T1sin15-45=0 Are these two equations & unknowns right? I keep getting T1 as being 34 N, but I know that cannot be right.

Hi there- I've been trying to solve this problem for the last hour, and I still feel stuck! So far, I've only seen problems with equal angles between the strings and the horizontal- I have no idea how to solve a problem when there's two different angles! A 45-N lithograph is supported by two...

ok, so she traveled 10 km in half an hour? I'm getting confused because the question states that the hill is 1 km long. The forces acting on the slope are the weight of the cyclist/bike, and the normal force that's pushing up perpendicular to the slope, right?

Since the speed of the cyclist is constant, the forces acting on her should all add up to zero. The length of the hill is 20 km? (I just used dimensional analysis). If the forces add up to zero since she is going at a constant speed, how do I know what force she has to apply to keep going up the...

Well, I've been staring at it for the past hour, and what I can't figure out is whether the biker is still going up the hill at the same rate, or if the road flattened out- does that even matter? I know that the speed is 20 km/hr, and since the biker got up a 1 km hill in half an hour, giving...

Could someone please help me with this problem? A cyclist, pedaling at 20 km per hour, climbs a 1 km high hill in a half hour. What average total force must she supply in order for her to make it on time? Assume that the mass of the cyclist plus cycle is 50 kg. Would this answer be accurate...