Q1. A proton travels with the speed of 8.34×105 m/s at an angle of 32.3° with the direction of a magnetic field. The field exerts a force of 3.00×10-17 N on the proton. What is the strength of the field?

Q2. A skateboarder shoots off a ramp with the velocity of 5.6 m/s, directed at an angle of 64° above the horizontal. The end of the ramp is 1.5 m above the ground. Let the x axis be parallel to ground, +y direction be vertically upward, and take as the origin the point on the ground directly below the top of the ramp. (a) How high above the ground is the highest point that skateboarder reaches? (b) When the skateboarder reaches the highest point, how far is this point horizontally from the end of ramp?

## What force is applied to the driver by his seatA loudspeaker of mass 15.0 is suspended a distance of h = 2.30 below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of l = 3.30. What is tension in each cable. |

## Analyse the time it would take a nasa satellite to travelNASA sends a satellite to another planet by placing the satellite in a Keplerian orbit (around the sun) such that the perihelion is at the radius of the Earth's orbit (1 AU) and the aphelion is at the radius of the planet's orbit. Most of the trip is.. |

## What angle does the force make with horizontalHow much work did the movers do (horizontally) pushing a 190-{rm kg} crate 11.2 m across a rough floor without acceleration, if effective coefficient of friction was 0.60. |

## What is the highest order of diffractionA 6.4kg ball, hanging from the ceiling by a light wire 135cm long, is struck in an elastic collision by a 1.80 ball moving horizontally at 4.20 m/s just before the collision. Find the tension in the wire just after the collision. |

## What is the radius of the trackHorse races once around a circular track in a time of 176 s, with a speed of 26 m/s. What is the radius of the track. |

## What are the velocities of the two ballsA rifle with a barrel length of 62 cm fires a 12 g bullet with a horizontal speed of 460 m/s/s. The bullet strikes a block of wood and penetrates to a depth of 15 cm. |

## How long does it take to move the boxIf coefficient of kinetic friction between the box and the floor is 0.570, how long does it take to move the box 4.00 m, starting from rest. |

## What is an image distanceA lens placed at the origin with its axis pointing all along the x axis produces a real inverted image at x=-24cm that is twice as tall as the object. What is an image distance. |

## Estimate how many times planet has orbited its starEstimate how many times planet has orbited its star |

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