4. A 90 kg rocket stuntman steps off of a platform that is 50 m above...
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4. A 90 kg rocket stuntman steps off of a platform that is 50
m above...
At a height h = 44.0 m above the ground a rocket is fired at an...
At a height h = 44.0 m above the ground a rocket is fired at an initial speed v0 = 168.0 m/s at an angle θ = 27 degrees above the horizontal. Ignore air resistance. The magnitude of the gravitational acceleration is 9.8 m/s2. Choose the RIGHT as positive x-direction. Choose UPWARD as psotitive y-direction. Keep 2 decimal places in all answers (a) Find v0x, the x component of the initial velocity (in m/s) (b) Find v0y, the y component...
(8%) Problem 11: A student launches a small rocket which starts from rest at ground level....
(8%) Problem 11: A student launches a small rocket which starts from rest at ground level. At a height of h- 1.85 km the rocket reaches a speed of ve 395 m/s. At that height the rocket runs out of fuel, so there is no longer any thrust propelling it. Take the positive direction to be upward in this problem. Ctheespertta.com 33% Part (a) Assuming constant acceleration, what is the rocket's acceleration, in meters per second squared, during the period...
5. A 65.0-kg woman steps off a 10.0-m diving platform and drops straight down into the...
5. A 65.0-kg woman steps off a 10.0-m diving platform and drops straight down into the water. After entering the water she continues falling through the water until she reaches a depth of 4.00 m. a. Calculate the work done on the woman by gravity and by the water. Ignore air resistance. b. What is the average net force exerted on her over this 4.00-m displacement in the water? c. How does the average net force exerted on the woman...
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.
"Rocket Man" has a propulsion unit strapped to his back. He starts from rest on the...
"Rocket Man" has a propulsion unit strapped to his back. He starts from rest on the ground, fires the unit, and accelerates straight upward. At a height of 18 m, his speed is 4.6 m/s. His mass, including the propulsion unit, has the approximately constant value of 128 kg. Find the work done by the force generated by the propulsion unit. (Neglect air resistance.) WP =
Assume a rocket is launched from a platform that is 20 meters high at angle of...
Assume a rocket is launched from a platform that is 20 meters high at angle of 53 degrees. While the rocket still has gasoline, it uniformly accelerates, maintains a launch angle relative to the ground, for four seconds and reaches a velocity of one hundred meters per second starting from rest. You may neglect any air resistance. Part 1: What is the max height the rocket can have before it falls back to ground? Part 2: How much time does...
Starting from rest, a 1.5x10-4 kg flea springs straight upward. While the flea is pushing off...
Starting from rest, a 1.5x10-4 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 3.7x10-4 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. (a) Number Units (b) Number Units
A model rocket blasts off from the ground, rising straight upward with a constant acceleration that...
A model rocket blasts off from the ground, rising straight upward with a constant acceleration that has a magnitude of 82.0 m/s2 for 1.82 seconds, at which point its fuel abruptly runs out. Air resistance has no effect on its flight. What maximum altitude (above the ground) will the rocket reach?
A model rocket blasts off from the ground, rising straight upward with a constant acceleration that...
A model rocket blasts off from the ground, rising straight upward with a constant acceleration that has a magnitude of 82.0 m/s2 for 1.70 seconds, at which point its fuel abruptly runs out. Air resistance has no effect on its flight. What maximum altitude (above the ground) will the rocket reach?
(8%) Problem 11: A student launches a small rocket which starts from rest at ground level. At a height of h- 1.85 km the rocket reaches a speed of ve 395 m/s. At that height the rocket runs out of fuel, so there is no longer any thrust propelling it. Take the positive direction to be upward in this problem. Ctheespertta.com 33% Part (a) Assuming constant acceleration, what is the rocket's acceleration, in meters per second squared, during the period...
5. A 65.0-kg woman steps off a 10.0-m diving platform and drops straight down into the water. After entering the water she continues falling through the water until she reaches a depth of 4.00 m. a. Calculate the work done on the woman by gravity and by the water. Ignore air resistance. b. What is the average net force exerted on her over this 4.00-m displacement in the water? c. How does the average net force exerted on the woman...
Starting from rest, a 1.5x10-4 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 3.7x10-4 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. (a) Number Units (b) Number Units
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