PHYSICS 1250 Quiz: PHYSICS 1250 Quiz 1 2014 Spring

• School: Ohio State University
• Department: Physics
• Course: PHYSICS 1250
• Professor: All

Document Summary

Start quiz 20 minutes before end of class. 1 meter (m) = 3. 281 feet 1 mile = 5280 feet 1 hour =3600 seconds |g|=9. 80m/s2 g=6. 67x10-11nm2/kg2 d/dx(axn)=naxn-1 xmdx= xm+1/(m+1), m -1 v=vi+at x-xi=vit+ at2 v2=vi. |ac|=v2/r v= r fext=ma |fc|=mv2/r f=-kx, | ff|= k|fn| 0 |ff| s|fn| |fg|=gm1m2/r2. Problem 1: at time t = 0 a 2-kg hockey puck moving on a frictionless horizontal surface has a velocity of (4m/s) - (3m/s) . Three seconds later its velocity is (2m/s) + (3m/s) . During this time the work done on it was: 4 j b) -4j c) -12 j d) -40 j e) (4 j) + (36j) . Problem 3: a floating block of ice is pushed through a displacement (in meters) d=11 -11 by a constant force (in newtons) f=186 -181 . How much work does this force do on the block during the displacement: 0j b) 55j c) 2050j d) 4040j e) 8080 j.