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A rural mail carrier leaves the post office and drives 22 km in a northerly direction. She then drives in a direction 60.0 Deg south of east for 47 km. what is her displacement form the post office?
The odometer (mileage gauge) of a car tells you the number of miles you have driven, A typical midsize car has tires 24.0 inches in diameter. How many revolutions of the wheels must the odometer count in order to show a mileage of 0.100 mile
A 2kg ball is rolling East (without slipping) down a hill that makes an angle of 30° with the horizontal. find the net acceleration at the instant the ball is kicked
You have been called to testify as an expert witness in a trial involving an automobile accident. How fast was this car traveling (to the nearest number of mph) just before the driver hit his brakes
An object with total mass mtotal = 15.6 kg is sitting at rest when it explodes into three pieces. One piece with mass m1 = 4.8 kg moves up, What is the mass of the third piece
A pendulum consists of a mass m suspended from a fixed point by means of a string of length b and is immersed in a viscous medium. Find its velocity and angular displacement at a later time
The specific heat of a 100-g block of a substance is to be determined.The block is placed in a 25-g copper calorimeter holding 60 g of water at 20°C. Determine the specific heat of the block
A near-sighted person might correct his vision by wearing diverging lenses with focal length f = -60cm. use ray tracing to determine the height of the image
You hold a spherical salad bowl 80cm in front of your face with the bottom of the bowl facing you. What is the orientation is it erect or inverted
If the ball is released from rest at a height of 0.78m above the bottom of the track on the no-slip side, what is its angular speed when it is on the frictionless side of the track? suppose the ball is a solid sphere of radius 2.3cm and mass 0.14k..
A rubber raft of mass 3M floats past a dock at 1 m/sec toward the east. A girl of mass 2M runs down the dock and jumps in the raft with a speed of 2 m/sec in the north direction. Find the final velocity of the raft and girl
An object is dropped from rest from a height of 3.9 107 m above the surface of the Earth. If there is no air resistance, what is its speed when it strikes the Earth
You are lowering two boxes, one on top of the other, down the ramp by pulling on a rope parallel to the surface of the ramp. find the magnitude of the friction force on the upper box
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