Recent content by evan b

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    Find minimum stopping distance of a car

    [b]1. Homework Statement It takes a minimum distance of 66.64 m to stop a car moving at 14.0 m/s by applying the brakes (without locking the wheels). Assume that the same frictional forces apply and find the minimum stopping distance, when the car is moving at 32.0 m/s. The Attempt...
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    Ball thrown up with an initial speed of 27.0 m/s

    Homework Statement A) The ball's PE is a constant. B) The velocity vector and the acceleration vector are in the same direction after t= 7.3s. C) The acceleration is constant. D) The acceleration is 0 near t= 7.3s. E) Maximum height is reached at about t=7.3s. F) The ball's KE increases...
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    Two forces at 45 pull an object distance of 14. What is work by both forces?

    ya, so i found force by sqrt of 7^2 + 7^2. then i multiplied it by 7 and go 69.30 J. What am i doing wrong?
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    How Do You Calculate the Angle Theta for a Pendulum Near Mt. Everest?

    Homework Statement Estimate the angle theta of the pendulum bob if it is 4.80km from the center of Mt. Everest. The Attempt at a Solution Tan(theta) = (GMeverest/r^2)/g I have been trying to use this formula, but i don't think its the right one?
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    Is the Work-Energy Principle Valid Without Friction?

    i finaly figured it out. it was FTFFTF.
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    Gravity acceleration 1/5 earths, how high?

    Homework Statement How far above the Earth's surface will the acceleration of gravity be one fifth of what it is on the surface?
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    Is the Work-Energy Principle Valid Without Friction?

    Homework Statement Select T-True, F-False, for each statement. If the first is T and the rest F, enter TFFFFF. A) The work done to raise a box onto a platform depends on how much time it takes to raise it. (Neglect friction, assume it starts on the ground at rest, and ends up resting...
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    Two forces at 45 pull an object distance of 14. What is work by both forces?

    What is the work done by the two forces together in moving an object a distance of d = 14 m as shown in the diagram? The magnitude of each force is 7 N.
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    Satellite. calculate radius of orbit

    Homework Statement satellite is in a circular orbit around the earth. The period of the satellite is 25.4 hr. Calculate the radius of the orbit of the satellite. Data: Mass of the Earth = 5.98 x 1024 kg
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    Truck and car collide, calculate magnitude of force on car from the truck

    Homework Statement A car of mass 6.50×102kg and a truck of mass 3.15×103kg run into one another due to ice on the road. 34.00ms after the collision, the car is pushing on the truck with a force whose magnitude is 1.98671×105N. Calculate the size of the force on the car due to the truck at...