# Posts by cbrown

Total # Posts: 12

**physicss please help**

Suppose m1 = 9.52 kg, m2 = 11.99 kg and vf = 5.71 m/s. If v1i = 10.1 m/s, what was v2i

**physics**

Find the center of mass where m1 = 6.9 kg and m2 = 2.1 kg.

**physics**

An 6.82 kg block drops straight down from a height of 1.31 m, striking a platform spring having a force constant of 1.16 10^3 N/m. Find the maximum compression of the spring.

**physics**

Suppose the diver vaults off the springboard, leaving it with an initial speed of 3.27 m/s upwards. Use energy conservation to find his speed when he strikes the water.

**physics**

An 6.82 kg block drops straight down from a height of 1.31 m, striking a platform spring having a force constant of 1.16 103 N/m. Find the maximum compression of the spring

**physics**

A hockey puck of mass 0.27 kg is sliding along a slippery frozen lake, with an initial speed of 56 m/s. The coefficient of friction between the ice and the puck is μK = 0.032. Friction eventually causes the puck to slide to a stop. Find the work done by friction.

**physics**

nvm

**physics**

A tomato of mass 0.17 kg is dropped from a tall bridge. If the tomato has a speed of 16 m/s just before it hits the ground, what is the kinetic energy of the tomato?

**math**

nvm, i got all these answers..

**math**

Two objects have the same kinetic energy. One has a speed that is 3.0 times greater than the speed of the other. What is the ratio of their masses? (Let m1 be the slower object and m2 be the faster.) m1/m2=

**physics**

i already got the answer.

**physics**

A baseball pitcher can throw a baseball at a speed of 42 m/s. If the mass of the ball is 0.12 kg and the pitcher has it in his hand over a distance of 1.9 m, what is the average force exerted by the pitcher on the ball?