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  1. A

    Find V2 of an elastic equation

    Homework Statement A 0.038-kg pet lab mouse sits on a 0.35-kg air-track cart, as shown in (Figure 1) . The cart is at rest, as is a second cart with a mass of 0.25 kg. The lab mouse now jumps to the second cart. After the jump, the 0.35-kg cart has a speed of v1=0.86m/s. What is the speed v2...
  2. A

    What is the acceleration of the block?

    Homework Statement A 50.0-kg block is being pulled up a 16.0° slope by a force of 250 N that is parallel to the slope. The coefficient of kinetic friction between the block and the slope is 0.200. What is the acceleration of the block? Homework Equations Fk=μkN F=MA The Attempt at a...
  3. A

    Find the potential, kinetic, and mechanical energy

    Homework Statement A 1.40 kg block slides with a speed of 0.885 m/s on a frictionless horizontal surface until it encounters a spring with a force constant of 637 N/m . The block comes to rest after compressing the spring 4.15 cm. Part A Find the spring potential energy, U, the kinetic energy...
  4. A

    Find final speed using mechanical energy formula

    Homework Statement A skateboarder at a skate park rides along the path shown in (Figure 1) .If the speed of the skateboarder at point A is v=1.3m/s, what is her speed at point B? Assume that friction is negligible. Homework Equations ui+ki=uf+kf u=mgh k=1/2mv2 The Attempt at a Solution...
  5. A

    What is the angle θ between the tow rope and the center line

    Homework Statement Water skiers often ride to one side of the center line of a boat, as shown in the figure (Figure 1) . In this case, the ski boat is traveling at 15 m/s and the tension in the rope is 90 N. If the boat does 3700 N of work on the skier in 54.8 m, what is the angle θ between...
  6. A

    Work problem: force vs distance curve for compound bow

    Homework Statement A compound bow in archery allows the user to hold the bowstring at full draw with considerably less force than the maximum force exerted by the string. The draw force as a function of the string position x for a particular compound bow is shown in (Figure 1) . Part A How...
  7. A

    What is the final position of the object?

    Homework Statement What is the final position of the object if its initial position is x = 0.40 m and the work done on it is equal to -0.19 J? Homework Equations work(J)= Fx ΔX The Attempt at a Solution I do not know where to begin??? please give me a hint where to begin.
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    What is the combined mass of the dog and basket?

    Homework Statement Children in a tree house lift a small dog in a basket 5.05 m up to their house. If it takes 221 J of work to do this, what is the combined mass of the dog and basket? Homework Equations work(J)= force(N)x Distance(m) The Attempt at a Solution W=FD........221J=F(5.05)m I'm...
  9. A

    Find the magnitude of the acceleration of the two blocks.

    Homework Statement a)Find the magnitude of the acceleration of the two blocks in (Figure 1) . Assume the top block slides without friction on the horizontal surface. b)If the 12-N block in (Figure 1) is replaced with a 12-N force pulling downward, as in (Figure 2) , is the acceleration of the...
  10. A

    What is the minimum horizontal force?

    Homework Statement What is the minimum horizontal force F needed to make the box start moving in (Figure 1) ? The coefficients of kinetic and static friction between the box and the floor are 0.25 and 0.46, respectively. Homework Equations Fs= mu * N The Attempt at a Solution So I know that...
  11. A

    How to find the minimum horizontal force?

    Homework Statement What is the minimum horizontal force F needed to make the box start moving in (Figure 1) ? The coefficients of kinetic and static friction between the box and the floor are 0.28 and 0.39, respectively. Homework Equations fk=mu N fs=mu N The Attempt at a Solution Im not...
  12. A

    What is the average launch speed?

    Homework Statement During several practice runs you stand at the end of a diving board and launch the basketball horizontally from a position 4.50 m above the water. If the average landing spot is6.25 m horizontally from your initial position, what is the average launch speed? Homework...
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