Recent content by senseandsanity

A spring clamped to the table is used to shoot a 20 g ball at a 30 degree angle. When the spring is compressed 20 cm, the ball travels horizontally 5.0 m and lands 1.5 m below the point at which it left the spring. What is the spring constant? I know how to find the spring constant once I...

I found the spring constant to be k=m*(((2*(mu)*g)/v)^2) but I'm not sure if my algebra is correct. Can anybody help? :confused:

How do you find the distance a spring is compressed by an object when kinetic friction is involved?

The problem is: A block of mass m slides at a speed v along a horizontal, smooth table. It next slides down a smooth ramp, descending a height h , and then slides along a horizontal rough floor, stopping eventually. If the zero level is a distance (2h/3) above the floor, what is the potential...

I need help with this question: A cardinal of mass 3.60×10-2 kg and a baseball of mass 0.141 kg have the same kinetic energy. What is the ratio of the cardinal's magnitude of momentum to the magnitude of the baseball's momentum (p_c/p_b)?

Mass 1 is moving with an initial speed of v_1, which undergoes a completely inelastic collision with a stationary block mass 2. The two blocks then stick together and move at a speed v_2. The two blocks then collide inelastically with a third block mass 3. Assuming that the blocks slide...

I'm still not getting the right answer and I need it for another question. Any other help would be great.

Using conservation of energy, I found the maximum height v to which an object will rise is h_max= ((1/2)*(v^2))/(g). At what height h above the ground does the projectile have a speed of 0.5v? I found h= (0.125*(v^2))/(g) but that isn't correct.

Aren't they looking for the final distance x_2 after the wrench was thrown? So wouldn't you need to first find x_1 and delta x to find x_2?

I need help with this question (the picture is attached): A foot, mass of 4 kg, is suspended by a pulley system. The net traction force needs to pull straight out on the leg. What is the proper angle theta for the upper rope? I know that the system is frictionless so the tension in the...