Recent content by frosti

Homework Statement A 7.00 g bullet, when fired from a gun into a 1.00 kg block of wood held in a vise, penetrates the block to a depth of 7.60 cm. This block of wood is next placed on a frictionless horizontal surface, and a second 7.00 g bullet is fired from the gun into the block. To what...

I entered my answer into the online homework thing and it told me I was 10% within the correct answer. I just can't figure out what's wrong with what I did. Man...

Homework Statement The mass of a car is 1500 kg. The shape of the body is such that its aerodynamic drag coefficient is D = 0.380 and frontal area is 2.50 m2. Assuming that the drag force is proportional to v^2 and ignoring other sources of friction, calculate the power required to maintain a...

nvm, I got it.

Homework Statement A roller coaster at the Six Flags Great America amusement park in Gurnee, Illinois, incorporates some clever design technology and some basic physics. Each vertical loop, instead of being circular, is shaped like a teardrop. The cars ride on the inside of the loop at the...

thank you guys so much. I got it now.

thank you for your reply guys. borgwal, don't force exerted by the trailer on the car backward and the force on the trailer forward on the car cancel out? so all that left me is one force 930 x 2.16? jenglish, you are saying the net force should be (930 + 320) x 2.16 right? but why would...

nvm, I got this. Thank you anyway.

Homework Statement A 930 kg car is pulling a 320 kg trailer. Together the car and trailer move forward with an acceleration of 2.16 m/s2. Ignore any frictional force of air drag on the car and all frictional forces on the trailer. determine the net force on the car. Homework Equations f...

Homework Statement A 2.00 kg object placed on a frictionless, horizontal table is connected to a string that passes over a pulley and then is fastened to a hanging 8.00 kg object, as shown in the figure. Find the magnitude of the acceleration of the two objects and the tension in the string...

nm, I got it. Thank you for all your help.

thank you for your input, i separated my problem into x and y components: x component ---> 1900 = 1009cos(theta) * t y component ---> 795 = 1009sin(theta) * t - 4.9t^2 I used my x component to solve for cosine 1900/1009 = cos(theta) * t cos(theta) = 1.883/t I then used trig identity...

Homework Statement A cannon with a muzzle speed of 1009 m/s is used to start an avalanche on a mountain slope. The target is 1900 m from the cannon horizontally and 795 m above the cannon. At what angle, above the horizontal, should the cannon be fired? (Ignore air resistance.)...