A firecracker with mass 100g is propelled vertically with a launch force of 1.2N applied over 5s, after which it explodes into two 50g fragments. One fragment goes horizontally at 15m/s and the other goes to the right at angle 53 degrees with the horizontal at speed 25 m/s. find the distance...
A 0.8 kg ball is whirled on a string r = 0.4 meters long in a vertical circular path. At the bottom of the circle, the ball is h = 0.45 meters from the ground. At the top of the circle, the ball has a speed of 3 m/s. Assume that the total energy of the ball is kept constant.
a. Calculate...
100 kg elevator acclerates up at rate avg a*. What's the avg force acting on the elevator if it covers a distance X over a period of 10s?
a* denotes average accleration
a. 2X + 1000
b. 100(a* + 1)
c. 2a* + 1000
d. 2a*X
I set up a free body diagram to show all the forces acting on the...
So confused about standing waves in a closed pipe, which is open at one end and closed at the other. The closed end has a node while the open end has an antinode. To figure the wavelength, i use the formula:
Lambda = 4L/n where n is the number of harmonic and can only be odd integers...
A light horizontal spring has a spring constant
of 108 N/m. A 3.05 kg block is pressed against
one end of the spring, compressing the spring
0.111 m. After the block is released, the block
moves 0.204 m to the right before coming to
rest.
The acceleration of gravity is 9.81 m/s2 .
What is...