Recent content by keweezz

Did he do the question correct?

Can someone help me solve A and B for this problem..? A(Po+pg(3/2)L)=2.71E4N what does Po and pg mean in here? is A = 1.5 in this problem?

16+3.4a=-53cos35+57 and solved for a. Thats that work. Is the equatio wrong?

To give a 16 kg child a ride, two teenagers pull on a 3.4 kg sled with ropes, as indicated in Figure 5-26. Both teenagers pull with a force of F = 53 N at an angle of 35° relative to the forward direction, which is the direction of motion. In addition, the snow exerts a retarding force on the...

i used -9 because that was the difference between 5-14? and its sin 40 :O so i find t and use Vi+at=Vf? i find t using x=Vit+1/2a(t)^2?

You and a friend stand on a snow-covered roof. You both throw snowballs from an elevation of 14 m with the same initial speed of 13 m/s, but in different directions. You through your snowball downward, at 40° below the horizontal; your friend throws her snowball upward, at 40° above the...

s(T- 2)= h- 4.905(\sqrt{h/4.905}- 2)^2= (3/7) h. For that part, i just do h- 4.905(\sqrt{h/4.905}- 2)^2= (3/7) h that and solve for h? i got 45.78 for h, but it didn't work out ;(

A ball, dropped from rest, covers three-sevenths of the distance to the ground in the last two seconds of its fall. (a) From what height was the ball dropped? _m (b) What was the total time of fall? _s For a, don't i need the final velocity to solve the problem? Vi=o A=-9.81? 2 days...

hm.. how is it used..? any thoughts?

Radiobiological Effectiveness for RBE i believe..and mrad is a unit like a millimeter.

Alpha particles with an RBE of 13 deliver a 32 mrad whole-body radiation does to a 69 kg patient. A) What dosage, in rem, does the patient receive? B) How much energy is absorbed by the patient? Can anyone help me with this problem? Stuck from the beginning..

A car is designed to get its energy from a rotating flywheel with a radius of 1.90 m and a mass of 510.0 kg. Before a trip, the disk-shaped flywheel is attached to an electric motor, which brings the flywheel's rotational speed up to 1008.0 rev/min. (a) Find the kinetic energy stored in the...