Two balls, A and B, are released simultaneously from rest at the left end of the equal-length tracks, as shown. (a) Which ball will reach the end of its track first? (b) Does ball B roll faster along the lower part of track B than ball A rolls along track A? (c) Is the speed gained by ball B going down the extra dip the same as the speed it loses going up near the right-hand end? Does this mean that the speeds of balls A and B will be the same at the ends of the tracks? (d) So, overall, does ball A or ball B have the greater average speed? (Do you wish to change your answer to (a)?
Two balls, A and B, are released simultaneously from rest at the left end of the equal-length tracks, as shown. (a) Which ball will reach the end of its track first? (b) Does ball B roll faster along the lower part of track B than ball A rolls along track A? (c) Is the speed gained by ball B going down the extra dip the same as the speed it loses going up near the right-hand end? Does this mean that the speeds of balls A and B will be the same at the ends of the tracks? (d) So, overall, does ball A or ball B have the greater average speed? (Do you wish to change your answer to (a)?
Two balls, A and B, are released simultaneously from rest at the left end of the equal-length tracks, as shown.
(a) Which ball will reach the end of its track first?
(b) Does ball B roll faster along the lower part of track B than ball A rolls along track A?
(c) Is the speed gained by ball B going down the extra dip the same as the speed it loses going up near the right-hand end? Does this mean that the speeds of balls A and B will be the same at the ends of the tracks?
(d) So, overall, does ball A or ball B have the greater average speed? (Do you wish to change your answer to (a)?
A person drops a hammer from the top of a boat’s vertical mast while the boat is moving rapidly and steadily straight forward. Where will the hammer hit the deck?
ahead of the base of the mast
behind the base of the mast
at the base of the mast
on the windward side of the base of the mast
Two metal balls are the same size but one weighs twice as much as the other. The balls are dropped from the roof of a single-story building at the same instant of time. The time it takes the balls to reach the ground below will bethe same. If these two metal balls of the roll off a horizontal table with the same speed. What would happen?
both balls hit the floor at approximately the same horizontal distance from the base of the table.
the heavier ball hits the floor at about half the horizontal distance from the base of the table than does the lighter ball.
the lighter ball hits the floor at about half the horizontal distance from the base of the table than does the heavier ball.
the heavier ball hits the floor considerably closer to the base of the table than the lighter ball, but not necessarily at half the horizontal distance.
the lighter ball hits the floor considerably closer to the base of the table than the heavier ball, but not necessarily at half the horizontal distance.
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