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Starting from rest, a 1.5x10-4 kg flea springs straight upward. While the flea is pushing off...
Starting from rest, a 1.9x10-4 kg flea springs straight upward. While the flea is pushing off...
Starting from rest, a 1.9x10-4 kg flea springs straight upward. While the flea is pushing off from the ground, the ground exerts an average upward force of 0.36 N on it. This force does 2.0x10-4 J of work on the flea. (a) What is the flea's speed when it leaves the ground? (b) How far upward does the flea move while it is pushing off? Ignore both air resistance and the flea's weight.
Starting from rest, a 1.8x10-4 kg flea springs straight upward. While the flea is pushing off...
Starting from rest, a 1.8x10-4 kg flea springs straight upward. While the flea is pushing off from the ground, the ground exerts an average upward force of 0.41 N on it. This force does 3.6x10-4 J of work on the flea. (a) What is the flea's speed when it leaves the ground? (b) How far upward does the flea move while it is pushing off? Ignore both air resistance and the flea's weight.
Starting from rest, a 1.7 10-4-kg flea springs straight upward. While the flea is pushing off...
Starting from rest, a 1.7 10-4-kg flea springs straight upward. While the flea is pushing off from the ground, the ground exerts an average upward force of 0.37 N on it. This force does +2.1 10-4 J of work on the flea. (a) What is the flea's speed when it leaves the ground? _______ m/s (b) How far upward does the flea move while it is pushing off? Ignore both air resistance and the flea's weight. _______ m
4. A 90 kg rocket stuntman steps off of a platform that is 50 m above...
4. A 90 kg rocket stuntman steps off of a platform that is 50 m above the ground (and he therefore starts at rest). While he is descending, his rocket pack exerts a steady upward force of 800 N. Ignore air resistance. (a) What is the magnitude and direction of the net force on the stuntman? (b) What is his acceleration? (c) How long does it take him to reach the ground? (d) What is his speed when he reaches...
1) A 48.5-kg skater is standing at rest in front of a wall. By pushing against...
1) A 48.5-kg skater is standing at rest in front of a wall. By
pushing against the wall she propels herself backward with a
velocity of -1.46 m/s. Her hands are in contact with the wall for
1.00 s. Ignore friction and wind resistance. Find the average force
she exerts on the wall (which has the same magnitude, but opposite
direction, as the force that the wall applies to her). Note that
this force has direction, which you should indicate...
Two professional skaters (Joe and Sue) start their routine by pushing off from a facing, stationary...
Two professional skaters (Joe and Sue) start their routine by pushing off from a facing, stationary pose as shown in figure (a). The kinetic frictional force acting on their skates can be ignored while they are pushing against each other, however once they separate, the force of kinetic friction eventually brings them to a halt. As shown in figure (b), after the push-off, they move in opposite directions with different speeds. The magnitude of their acceleration is the same, but...
In the figure, a solid 0.3 kg ball rolls smoothly from rest (starting at height =...
In the figure, a solid 0.3 kg ball rolls smoothly from rest (starting at height = 5.6 m) until it leaves the horizontal section at the end of the track, at height h = 2.1 m. How far horizontally from point A does the hit the floor? Number i Units
In the figure, a solid 0.1 kg ball rolls smoothly from rest (starting at height H...
In the figure, a solid 0.1 kg ball rolls smoothly from rest (starting at height H = 5.5 m) until it leaves the horizontal section at the end of the track, at height h = 2.0 m. How far horizontally from point A does the ball hit the floor? Number Units
In the figure, a solid 0.4 kg ball rolls smoothly from rest (starting at height H...
In the figure, a solid 0.4 kg ball rolls smoothly from rest (starting at height H = 5.6 m) until it leaves the horizontal section at the end of the track, at height h = 1.9 m. How far horizontally from point A does the ball hit the floor? Number Units
11) While standing at the edge of the roof of a building, a man throws a...
11) While standing at the edge of the roof of a building, a man throws a stone upward with an initial speed of 5.71 m/s. The stone subsequently falls to the ground, which is 11.3 m below the point where the stone leaves his hand. At what speed does the stone impact the ground? Ignore air resistance and use ?=9.81 m/s2 for the acceleration due to gravity. impact speed:———- How much time is the stone in the air? elapsed time:———-...
1) A 48.5-kg skater is standing at rest in front of a wall. By
pushing against the wall she propels herself backward with a
velocity of -1.46 m/s. Her hands are in contact with the wall for
1.00 s. Ignore friction and wind resistance. Find the average force
she exerts on the wall (which has the same magnitude, but opposite
direction, as the force that the wall applies to her). Note that
this force has direction, which you should indicate...
In the figure, a solid 0.3 kg ball rolls smoothly from rest (starting at height = 5.6 m) until it leaves the horizontal section at the end of the track, at height h = 2.1 m. How far horizontally from point A does the hit the floor? Number i Units
In the figure, a solid 0.1 kg ball rolls smoothly from rest (starting at height H = 5.5 m) until it leaves the horizontal section at the end of the track, at height h = 2.0 m. How far horizontally from point A does the ball hit the floor? Number Units
In the figure, a solid 0.4 kg ball rolls smoothly from rest (starting at height H = 5.6 m) until it leaves the horizontal section at the end of the track, at height h = 1.9 m. How far horizontally from point A does the ball hit the floor? Number Units
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