Which of the following expressions for the cart's initial and final kinetic energy KE and the cart-Earth system's initial and final gravitational potential energy Ug could be used to determine the speed vf of the cart when it reaches the top of the loop? Block X and block Y are made of the same material. So I'm going to a calculator does most calm and I'm going to declare my variables first. 81 Um You it doesn't like meal. 4 and um you sub K. 3. In each situation, total system momentum is conserved as the momentum change of one cart is equal and opposite the momentum change of the other cart. The masses of the blocks are indicated in the figure. Which pair of opposing forces in which directions could be responsible for the acceleration of the object? A satellite moves in a circular orbit at a constant speed v0 around Earth at a distance R from its center. Created by Sal Khan. Which of the following best indicates how the student should use the graph to determine whether the collision is elastic or inelastic and provides a correct justification? The figure shows an initially stationary block. If the acceleration of the blocks is a, which of the following expressions is equal to T2? Free body diagrams for the block at positions X, Y, and Z are shown in the figure. The block is free to move horizontally along the track, as shown above.
Which of the following equations for the conservation of momentum could a student use to help determine the speed vf of each block after the collision? Closed Same Changes Block X and block Y are tied together by a rope. D - Planet Y, because the magnitude of the slope of the curve increases at a faster rate. If you know the coefficient of static friction and the normal force between the object and the surface the product of these two numbers by definition is the maximum force of static friction. Which data from the graph should the student use to determine the direction of the net force exerted on the cart and the direction of the change in momentum of the cart from the time intervals of A to B? After the collision, masses M, and M2 slide together up the curved come to rest at their highest position along the ramp. The figure shows an initially stationary block login. Which of the following could represent the initial velocity, vo, and the final velocity, vf, of the object? Point P Mgh +1/2mv^2 Point Q mgh+1/2mv^2 Objects X and Y are connected by a string of negligible mass and suspended vertically over a pulley of negligible mass, creating an Atwood's machine, as shown in the figure.
17 m per second square. The kinetic coefficient of friction is not always the same amount less than static friction, in some cases it could even be more, because friction relies on many factors. The figure shows an initially stationary blocks. A graph of the force exerted by the spring on the object as a function of the position of the object is shown. As another demonstration of momentum conservation, consider two low-friction carts at rest on a track.
The ball is attached to a string and travels in the horizontal, circular path, as shown in Figure 1. So I think I'm gonna not use the calculator. 20 J of energy is removed from the block. 0218 s) = 280 cm/s (rounded). Which of the following procedures could the student use to determine the cart's acceleration? At time t=0s, object X of mass M travels at a constant speed of 2 m/s to the right toward object Y of mass 2M that is a distance of 8m away from object X while at rest, as shown above.
C. the same for each skater. 27-kg homemade cannon. What is the net force on Planet Y, and what reasoning supports this claim? In which trial will the cart experience the greatest change in momentum from 0s to 2 s? Fi minus mu times MG minus he. Like any problem in physics, this one is best approached by listing the known information. You will get your answer. M3a3=TBm3a3=TB and m2a2=TA−TB How does the magnitude of the force exerted by the stick on the puck Fpuck, stick compare to the magnitude of the force exerted by the puck on the stick Fstick, puck at the time interval in which the stick is in contact with the puck? The negative sign in the above equation serves the purpose of making the momenta of the two objects opposite in direction.