Two identical 0.900 kg masses are pressed against opposite ends of a light spring of force constant 1.75 N/cm, compressing the spring by 20.0 cm from its normal length. Find the speed of each mass when it has moved free of the spring on a frictionless, horizontal table.

A block of mass m= 2 kg is moving with speed 7ms^-1. It collides inelastically with a stationary block of unknown mass M. The two move off with velocity 5 ms^-1. What’s the value of M?

u = 1.66 x 10-27 kg; v = 1.050x107 m/s. (in J) A uranium-238 nucleus undergoes a radioactive decay, The masses are approximately 238, 234 and 4 u, where u = the atomic mass unit. The U nucleus is initially at rest. Suppose the He nucleus has speed v. Then what is the kinetic energy of the Th nucleus? Parameters: A: 4.004x10-15 B: 5.006x10-15 C: 6.257x10-15 OC: 6.257x10-15 Submit Answer Tries 0/12 238 U Post Discussion → 234Th + 4He. D: 7.821x10-15 D: 7.821x10-15 OE: 9.776x10-15 F: 1.222x10-14 G: 1.528x10-14 H: 1.909×10-14 Send Feedback

53. ssm mmh Two friends, Al and Jo, have a combined mass of 168 kg. At an ice skating rink they stand close together on skates, at rest and facing each other, with a compressed spring between them. The spring is kept from pushing them apart because they are holding each other. When they release their arms, Al moves off in one direction at a speed of 0.90 m/s, while Jo moves off in the opposite direction at a speed of 1.2 m/s. Assuming that friction is negligible, find Al's mass.

3. John is performing an experiment in a Uwindsor lab. In this lab, John has two toy car's of mass m1 and m2 connected together to form a car of mass m whose velocity is v. While traveling a force causes these car's to separate, with the heavier car being at rest as a result. If John notes the kinetic energy of the moving car is 28 mv 2 what is the mass of the moving car? А. 0.018m В. 5.1m C. 0.011m D. 0.028m Е. 0.11m

A pitcher claims he can throw a 0.142-kg baseball with as much momentum as a 2.88-g bullet moving with a speed of 1.50 ✕ 103 m/s. (a) What must the baseball's speed be if the pitcher's claim is valid?

Two workers with equal mass m stand on a cart with mass 3m and try to achieve a maximum "backwards" speed, after running along the cart and jumping off horizontally. Which strategy will result in the higher final speed of the cart: a) Both running and jumping off together b) One running and jumping off, then the other one running and jumping off Confirm your answers by evaluating both options, if the men's masses are 80kg each and they run at a speed of 1m/s relative to the cart. c) If the men have different weights, which one should run and jump first to achieve the higher speed of the cart, the heavier or the lighter person?

A snowball is thrown with a speed of 42.0 km/h, giving it momentum with a magnitude of 2.00 Ns. The mass of the snowball, in grams, is what?

Bryce, a mouse lover, keeps his four pet mice in a roomy cage, where they spend much of their spare time, when they're not sleeping or eating, joyfully scampering about on the cage's floor. Bryce tracks his mice's health diligently and just now recorded their masses as 0.0109 kg, 0.0175 kg, 0.0137 kg, and 0.0189 kg. At this very instant, the ?‑ and ?‑components of the mice's velocities are, respectively, (0.569 m/s,−0.521 m/s), (−0.805 m/s,−0.619 m/s), (0.321 m/s,0.455 m/s), and (−0.305 m/s,0.717 m/s). Calculate the ?‑ and ?‑components of Bryce's mice's total momentum, ?? and ??.

A small ball of mass mb = 0.050 kg is projected into a pendulum of mass Mp = 0.200 kg in a ballistic pendulum experiment. How fast does the ball need to go in order to get the pendulum to swing up to a height of h = 0.25 m abov its original position? O 11.1 m/s 0.553 m/s 2.21 m/s 0.111 m/s