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a soccer player kicks a soccer ball initially at rest setting it in motion at a velocity of 30 ms if the ball has a
a 15 kg ball falls onto a floor just before it strikes the floor its velocity is 12 ms the ball bounces up with a
mike jumps 1 m down onto a walkway his downward motion stops in 0020 seconds if he forgets to bend his knees what force
a boy on a roof throws one ball downward and an identical ball upward the ball thrown downward hits the ground with 100
sarah and her bicycle have a total mass of 40 kg her speed at the top of a 10 m high and 100 m long hill is 5 ms if the
a jet engine is moving an airplane forward at a speed of 900 kmhr if the thrust of the engine is 1x105 n what is the
for safety reasons the speed of a child at the bottom of playground slide cannot exceed 60 ms what is the maximum
a pulley cable system on a construction site lifts 20000 n concrete block to a height of 40 m if this takes 2 minutes
during a baseball game a batter approaches the plate the pitcher hurtles the ball in the direction of the batter at a
a heat engine takes in 1000 j of energy at 1000 k and exhausts 615 j at 200 k what are the actual and maximum
an extension cord made of two wires of diameter 0129 cm no 16 copper wire and of length 24 m 8 ft is connected to an
a 450 cm3 block of aluminum d 27 gcm3 is lowered carefully into a completely full beaker of water what is the weight
a liter of water has a mass of 1 kg and the mass of a water molecule is 18 amu how many molecules of water are there in
given that the carbon atom has a mass of 12 amu how many carbon atoms are there in a diamond with a mass of 8
at a rock concert the engineer decides that the music isnt loud enough he turns up the amplifiers so that the amplitude
if it takes 40 j to push a large box 4 m across a floor what is the magnitude of the force on the box the push is in
two forces act on a 5kg object one force is 40 n and directed east the other force is directed west the acceleration of
a laptop computer sits on the horizontal surface of the seat of a car moving at 80 ms the driver starts slowing down to
a copper alloy has a youngs modulus of 13 1011 pa and density of 940 103 kgm3 what is the speed of sound in a thin rod
a truck moving at 133 ms hits a concrete wall as a result of the collision a 6 kg wrench moves forward and strikes the
a satellite moves in a circular orbit around earth at a speed of 4714 msa determine the satellites altitude above the
a violin string is 33 cm long the wave speed is 140 msa what are the wavelengths of the first 3 harmonicsb what are the
the reaction time of the average automobile driver is about 07 s the reaction time is the interval between the
a stone is thrown with an initial speed of 12 ms at an angle of 30 degrees above the horizontal from the top edge of a
a 1000 kg sports car of mass accelerates from rest to 20 ms in 66 s what is the force exerted by the road on the