Q. A person doing a chin-up weighs 655 N exclusive of the arms. During the first 15.0 cm of the lift, each arm exerts an upward force of 355 N on the torso. If the upward movement starts from rest, what is the person's velocity at this point?

Q. A 1000 {rm kg} wrecking ball hangs from a 15 {rm m}-long cable. The ball is pulled back until the cable makes an angle of 25.0^circle with the vertical. By how much has the gravitational potential energy of the ball changed?

## What are the spacetime coordinates of an event in sAn event occurs at x′ =60m, t′ =8×10-8 sec in a frame S′ (with y′ =0, z′ = 0). The frame S′ has a speed of 3c/5 in the x direction with respect to frame S. The origins of S and S′ coincide at t = 0, t′ = 0. What are the spacetime coordinates of th.. |

## At what location on x-axis is the electric field zeroA hotel elevator ascends 170 {rm m} with a maximum speed of 5.90 {rm m/s}. Its acceleration and deceleration both have the magnitude of 1.3 {rm m/s^2}. |

## The ball make between release and catchA block of mass 2.7 kg being released from rest on a 1m frictionless plane, inclined at an angle of 40 degree. The block sided down the inclined and struck second block mass of 3.7 kg. If the two blocks stick together, with what speed would they move.. |

## How numerous extra electrons are on this particular oil dropHow numerous extra electrons are on this particular oil drop (given the presently known charge of the electron)? |

## Find the coefficient of kinetic friction between the rampJulie drives 100 mi to her Grandmother's house. On the way to Grandmother's, Julie drives half the distance at 25mph and the other half at 80. On her return trip, she drives half time at 25mph and half the time at 80 mph. |

## Calculate the torque the player applies to one end of itThe coefficient of static friction between the wall and the rod is μs = 0.575. Determine the minimum distance x from point A at which an additional weight w (the same as the weight of the rod) can be hung without causing the rod to slip at point A. |

## What is the car''s speed at the bottom of the dipHow much power must you exert to horizontally drag a 20.0 kg table 14.0 m across a brick floor in 40.0 s at constant velocity, assuming the coefficient of kinetic friction between table and floor is 0.550. |

## Find the maximum angle between string and verticalA pendulum consists of a 4.98kg mass on the end of a 0.873 m string. The mass is pulled aside so the string makes an initial angle with the vertical of 12.5o. The mass is then released with initial speed of 2.10m/s upward and perpendicular to the rop.. |

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