Recent content by Enduro

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    Dynamics in Two Dimensions Question

    Homework Statement During baseball practice, you go up into the bleachers to retrieve a ball. You throw the ball back into the playing field at an angle of 42° above the horizontal, giving it an initial velocity of 15 m/s. If the ball is 5.3 m above the level of the playing field when you...
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    What is the acceleration of a sled in a tractor-pull competition?

    Homework Statement In a tractor-pull competition, a tractor applies a force of 1.3 kN to the sled, which has mass 1.1 × 104 kg. At that point, the coefficient of kinetic friction between the sled and the ground has increased to 0.80. What is the acceleration of the sled? Explain the...
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    How Does Elevator Motion Affect Work Done by Forces?

    1. Homework Statement the question is: A 62 kg person in an elevator is moving up at a constant speed of 4.0 m/s for 5.0 s. T / I C (b) Calculate the work done by the normal force on the person. (c) Calculate the work done by the force of gravity on the person. (d) How would your...
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    Calculating work with kinematics and dynamics

    the elevator is accelerating so fnet can not equal to 0. fn +fg=ma