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a 160 kg horizontal beam is supported at each end a 300 kg piano rests a quarter of the way from one end what is the
four railroad cars each of mass300 x 104 kg are coupled together and coastingalong horizontal tracks at speed vi toward
a 026 kg rock is thrownvertically upward from the top of a cliff that is 33 m high whenit hits the ground at the base
at a carnival you can try to ring a bell by striking a target with a 9 kg hammer in response a 04 kg metal piece is
a helicopter of mass 3770 kg can create an upward lift forcef when empty it can accelerate straight upward at amaximum
an elastic conducting material is stretched into a circularloop of 110 cm radius it is placedwith its plane
at the distance of the earth from the sun the pressureexerted by sunlight is about 10-5 pa how muchforce does this
after 107 s a spinning roulette wheel has slowed down to anangular velocity of 225 rads during this time the wheel has
a 60kg woman balances on the heel of her right shoe whosearea is 05cm2 how much pressure does she exerton the floor how
an elevator is moving downward but has a constand upwardacceleration of a35ms2 at a moment when the elevator speed is
a block of mass 50kg is pushed 20m along a frictionlesssurface by a constant horizontal force of 60nwhat is the net
a race driver has made a pit stop to refuel after refuelinghe leaves the pit area with an acceleration whose magnitude
a ski starts from rest and slides down a 29deg incline 100 mlong use energy methodsa if the coefficient offriction is
the angular speed of a propeller on a boat increases with constantacceleration from 109 rads to 240 rads in 220
what is the impact speed when a car moving at 300 kmh bumpsinto the rear of another car traveling in the same direction
the drive train of a bicycle includes wheels 673 cm indiameter and pedal cranks 175 cm long the cyclist pedals at
a 100-v battery is connected to a 120-ohm resistor ignoring the internal resistance of the battery calculate the power
a disk of mass m and radius r rolls back and forth on avertical track of radius aa write the langrangian for the
after you pick up a spare your bowling ball rolls withoutslipping back toward teh ball rack with a linear speed of v
a wedge of mass m and angle alpha is resting on africtionless horizontal plane a rectangular box of mass m is onthe
an ice cube is placed in a microwave oven suppose the ovendelivers 97 w of power to the ice cubeand that it takes 32170
after hitting a long fly ball that goes over the rightfielders head and lands in the outfield the batter decides tokeep
a 128 g bulletis fired horizontally into a 93 g woodenblock initially at rest on a horizontal surface afterimpact the
a 40-kg projectile leaves a 2000-kg launcher with a speed of400 ms what is the recoil speed of the
a 2100-kg truck traveling north at 41 kmhr turns east andaccelerates to 60 kmha what is the change in the trucks