Recent content by enter260

You also have to take into account the mass that change. Since the balance wheel dimensions were made 1/3 the original, you should have 1/27 the original mass.

Hmm I'm having trouble with this one. Could you lead me in the right direction?

Many thanks. I solved for it correctly and calculated that the speed as the highest point turns out to be 39.14. Then I just plugged it in and it worked. Thank you again.

Typo on my part. I wanted initial velocity to be 76 m/s (instead of 16). 76 was given, and 152 I obtained through the conservation of momentum equation. (20.6 kg)(76 m/s)= (10.3 kg) (Velocity of fragment) Solving that equation yielded 152 m/s. Is something wrong about that...

A projectile of mass 20.6 kg is fired at an angle of 59.0^\circ above the horizontal and with a speed of 76.0 m/s. At the highest point of its trajectory the projectile explodes into two fragments with equal mass, one of which falls vertically with zero initial speed. You can ignore air...

argh. i can't seem to get the second part. my equation is... 1/2kx^2 + (u_k)mgcos(53.1) - (1/2)(m)(v^2)=0 can anyone help?

i had the same problem as you. i entered it with the asterisk and it was fine. i believe the system interprets "asin(theta)" as arcsin?

Peach. The answer is correct. Check the way you entered it. Make asin(theta), apparently, is not the same as a*sin(theta). The system probably screwed you over that way.