Recent content by David Earnsure

Oh this is so obvious how could I of missed that! So I worked out the accelerations for 3 different radius lengths and they're all exactly the same!

I am still completely stuck, I have looked up the equations for constant rotational acceleration and found: acceleration = Torque/rotational inertia Using the above formula I plugged in all sorts of different scenarios with radius increasing and mass increasing (or even staying the same) and...

Hmm some good points.. So let's say for example my original frozen can has a mass of 1kg and a radius of 2cm. I = ½ 1kg x 2cm2 (saying that frozen can is a solid cylinder as for the purpose of this experiment I am limited to rotational motion) = 2 kg cm2 Now let's double the radius assuming this...

Homework Statement I am doing the old frozen can vs liquid can experiment and one of the questions asks that if cans with different diameters were used with the same contents (so same mass relative to diameter size) how would this effect the time taken for the cans to go down a ramp (how would...

Thankyou for your prompt reply, Well since a = F/m and I know that the force is the same but that the masses are different, I can say that the acceleration of the heavy truck (x) would be half that of the lighter truck (y). For example: F=5 mass(x) = 2 mass(y) = 1 a(x) = 5/2 = 2.5 a(y) = 5/1 =...

Homework Statement 2 trucks, one with twice as much mass than the other, are at rest on separate tracks. A man pushes each truck for 5 seconds. If you ignore friction and assume equal force is exerted on both trucks - which truck will have the most kinetic energy afterwards? Homework Equations...

Oh thanks, that's actually really simple! If it was thrown up at 10m/s the force of gravity on the ball would reduce that speed to 0m/s after one second, once is comes to 0m/s its reached its peak and would then fall accelerating at 10m/s^2 after one second reaching a speed of 10m/s it would be...

Homework Statement Ignoring air drag, how fast must you toss a ball straight up for it to take 2 seconds to return to same level you threw it from. 1. 20 m/s 2. 7.5 m/s 3. 15 m/s 4. 5 m/s 5. 10 m/s Homework Equations vf = vi + a x t The Attempt at a Solution To me this problem seems...