Recent content by jli10

Sorry, I forgot to include the question statement: Which is the best value for the mass of the block? a) 3 kg b) 5 kg c) 10 kg d) 20 kg e) 30 kg Thanks for your reply AdkinsJr. So if the spring force is not the specified constant force in the problem, what exactly is? Also, if the...

Homework Statement An experiment consists of pulling a heavy wooden block across a level surface with a spring force meter. The constant force for each try is recorded, as is the acceleration of the block. The data are shown below: Force F in Newtons: 3.05 | 3.45 | 4.05 | 4.45 | 5.05...

Whoops, sorry, I meant 2-d. But I think I understand now... You just have to do conservation of momentum for each axis, right? Since the initial momentum is all in the x-direction, the final momentum for the y-components must sum to 0, which is shown in equation III. The initial x-momentum is...

Homework Statement A ball of mass m_1 travels along the x-axis in the positive direction with an initial speed of v_0. It collides with a ball of mass m_2 that is originally at rest. After the collision, the ball of mass m_1 has velocity {v_1}_{x}{\hat{x}}+{v_1}_{y}{\hat{y}} and the ball of...

Homework Statement A cannon fires projectiles on a flat range at fixed speed but with variable angle. The maximum range of the cannon is L. What is the range of the cannon when it fires at an angle \frac{\pi}{6} above the horizontal? Ignore air resistance. Homework Equations Four...

Hello, My school does not offer the F=ma exam, but I would very much like to participate. Assuming that it is not feasible for my teacher to administer the exam, are there any other possibilities for sites where I could compete? I read on the website that there are university sites - has...