When you jump upward, your hang time is the time your feet are off the ground. Does hang time depend on your vertical component of velocity when you jump, your horizontal component of velocity, or both? Defend your answer.

Q: Suppose you are on a range, and you fire a rifle at a target 100 meters away. The bullet leaves the…

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Q: You the trying to view intevanal Space Station, which travels in roughly circular orbit arcund…

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Q: 1) A 5-kg object is initially at rest on a table 2 m above the ground. If it is released and falls…

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Q: 39. A bullet is fired horizontally from a rifle at 200 m/s from a cliff above a plain below. The…

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Q: An airplane flies horizontally at a speed of 517 km/h and drops a crate that falls to the horizontal…

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Q: Which allows you to jump the farthest? Why? Only using your ankles? Knees and ankles?…

A: The ability to jump the farthest largely depends on the joint and muscle coordination in your lower…

Q: What would be the weight (in Newtons) of an apple at the surface of the Moon? Use: m_apple = 100 g…

A: Given data:  mapple  = 100 g = 100×10-3 kg Mmoon = 7.3×1022 kg. Rmoon = 1.7×106 m Gravitational…

Q: A stone dropped from a captive balloon at an elevation of 1200 ft. Two seconds later another stone…

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Q: A rock and a feather dropped from the top of a building. Which will reach the ground first?   When…

A: The rock and feather would reach the ground in the same time in the absence of the air resistance.…

Q: Near the end first two runners of 75.0m. The front of a marathon race, the separated by a distance…

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Q: A jet plane has a takeoff speed of ? = 75 m/s and can move along the runway at an average…

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Q: You are diving board over a swimming pool. You are throwing upward a tennis ball at a speed 3 m/s.…

A: Let height is h between board and water  Now by  V2 = U2 + 2ah  152 = 32 + 2(-9.8)h  h =…

Q: A regular tennis ball and another filled with lead pellets are dropped at the same time from the top…

A: The ball which will strike the ground first is heavier tennis ball as the resistance due to air on…

Q: The mementum of the ball and putty offer the collision is

A: This question is based on collision. In all type of collision momentum is conserved provided  only…

Q: if you drop a feather on and a steel hammer at the same moment, they should hit the ground at the…

A: The second equation of motion is  where, s is the distance, u is the initial velocity, t is the…

Special Relativity

The theory of special relativity discusses how space and time are related to objects traveling along a straight line at a constant speed. Simply stated, as an object reaches the speed of light, its mass becomes infinite and it is unable to move faster than light. This interstellar speed limit has been the topic of much debate in astronomy, and also in science fiction when people consider how to fly over large distances.