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the speed of a bobsled is increasing because it has an accelerationof 24ms2 at a given instant in time the forces
a bicyclist coasts down a 70 degree hill at a steady speed of 50 ms assuming a total mass of 75kg bicycle plus rider
a volleyball is spiked so that its incoming velocity of 40ms is changed to an outgoing velocity of -21 ms the massof
a train is traveling up a 46deg incline at a speed of 327 ms when the last car breaks free and beginsto coast without
a horizontal board weighing 2320 nis supported at points a and b in the figure below the plankserves as a platform for
a golf ball of mass 0045 kg is hit off the tee at a speed of45 ms the golf club was in contact with the ball for 50
a 18 g rifle bullet traveling 230 ms buries itself in a 36 kg pendulum hanging on a 28 m long string which makes the
a bullet is fired horizontally with an initial velocity of 250ms from a tower that is 20 m higha calculate the time the
on a frozen pond a 116 kg sled is given a kick that impartsto it an initial speed of vo 215 ms the coefficientof
a 450 kg girl is standing on a 136 kgplank the plank originally at rest is free to slide on a frozenlake which is a
a tennis player receives a shot with the ball 00600 kgtraveling horizontally at 500 ms andreturns the shot with the
a person stands at a point 300 m in frontof the face of a sheer cliff if the person shouts how much time will elapse
positive focal lengths correspond to concave lensesconvex lensescompound lensesconvolted
a man drinks a bottle of beer and proposes to work off its460kj by exercising with 20 kg barbell if each lift of
if a real object is placed inside the focal point of a diverging lens the image isvirtual inverted andreducedvirtual
a rifle with a barrel length of 610 cmfires a 100 g bulletwith a horizontal speed of 360 rm ms the bullet strikes a
two pole-vaulters just clear the bar at the same height thefirst lands at a speed of 707 ms while the second lands at
suppose the skateboarder shown in the drawing reaches a height of230 m above the right side of the semicircular ramp he
a 500 g object moving to the right at200 cms makes an elastic head-oncollision with a 100 g object that isinitially at
two gliders are positioned on an air track m1 and m2 m2 is stationary and m1 is then pushed down the track and collides
starting from rest a 57 kg block slides 24 m down a rough 300deg incline thecoefficent of kinetic friction between the
a disk of radius r and uniform surface charge density sigma liesin the xy plane with its axis coinciding with the z
a 140 kg astronaut including space suit acquires a speed of250 ms by pushing off with his legs from an 1800 kg
determine the force required to push a 1000kg stoneblock up the side of the pyramid along a ramp the ramp has anangle