Questions Answered

tom0108:
Suppose you were skateboarding and wanted to use a spring to launch you off a ramp. Assuming you have a mass of 70 kg, if the spring has a …
 updated one year ago
 5 replies
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tom0108:
Solve for t: xf = xi + at^2
 updated one year ago
 10 replies
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tom0108:
Solve for y: (7*10^9)y  17(delta)q = 4(pi)z^2
 updated one year ago
 3 replies
 1 Medal

tom0108:
You are leaving Planet X in a spaceship. As you are traveling, you crash into an asteroid 34 million light years away. How far away from the…
 updated one year ago
 3 replies
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tom0108:
You are leaving Planet X in a spaceship. As you are traveling, you crash into an asteroid 34 million light years away. How far away from the…
 updated one year ago
 3 replies
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tom0108:
Suppose that you are on a planet, that has an average radius 1*10^9 meters and average density 7.4 kg/m^3. Assuming that it is a perfect sph…
 updated one year ago
 4 replies
 1 Medal

tom0108:
Suppose that you are on a planet, that has an average radius of 1*10^9 meters and average density 7.4 kg/m^3. Assuming that it is a perfect …
 updated one year ago
 3 replies
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tom0108:
Suppose that you are on a planet, that has an average radius 1*10^9 and average density 7.4 kg/m^3. Assuming that it is a perfect sphere, fi…
 updated one year ago
 3 replies
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tom0108:
Suppose that you are on a planet, that has an average radius 1*10^9 and average density 7.4 kg/m^3. Assuming that it is a perfect sphere, fi…
 updated one year ago
 8 replies
 1 Medal

tom0108:
Solve for v = (17 + x)v = 25g
 updated one year ago
 4 replies
 1 Medal

tom0108:
A 25000 kg truck moving at 40 m/s on a road angled at 17° hits a 10000 kg van moving at 25 m/s on a road angled at 60° at an intersection be…
 updated one year ago
 15 replies
 1 Medal

tom0108:
A 25000 kg truck moving at 40 m/s hits a 10000 kg van moving at 25 m/s from behind. Since this is a onedimensional perfectly inelastic col…
 updated one year ago
 23 replies
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tom0108:
Planet A is an irregularly shaped object with a pointy end and a total mass 1*10^17 kg. The rocket will crash into Planet A at a point where…
 updated one year ago
 2 replies
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tom0108:
The escape velocity on Planet X is the speed the rocket needs in order to never fall back down again in a universe in which X is the only ob…
 updated one year ago
 1 reply
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tom0108:
The escape velocity on Planet X is the speed the rocket needs in order to never fall back down again in a universe in which X is the only ob…
 updated one year ago
 1 reply
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tom0108:
Supposed that you are on a planet, which has an average radius 1*10^9m and average density 7.4kg/m^3. Assuming that it's a perfect sphere, f…
 updated one year ago
 2 replies
 1 Medal

tom0108:
Standing at the edge of a cliff 240 m tall, you throw two balls into the air – one directly upwards at 5 m/s and another directly downwards …
 updated one year ago
 2 replies
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tom0108:
Cart Mass =200kg
String compressed by = 5m
Initial velocity =25 m/s
…
 updated one year ago
 4 replies
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tom0108:
A cannon launches a cannonball with an initial speed 210 m/s at a 70° angle from the horizontal.
If the cannonball has a mass of 25 kg, how…
 updated one year ago
 13 replies
 2 Medals

tom0108:
A spring BB gun fires a BB at a speed of 35 m/s. If the barrel is 1.5 m long, what is the spring constant of the gun?
 updated one year ago
 5 replies
 1 Medal

tom0108:
Find the contribution V1 to the electric potential at P from the 5 nC charge at x =  1. r1 = 2.828
 updated one year ago
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tom0108:
. You drop a ball from a window on an upper floor of a building and it is caught by a friend on the ground when the ball is moving with spe…
 updated one year ago
 2 replies
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tom0108:
. In a test run, a certain car accelerates uniformly from zero to 24.0 m/s in 2.95 s. (a) What is the magnitude of the car’s acceleration…
 updated one year ago
 7 replies
 1 Medal

tom0108:
A jet plane lands with a speed of 100 m/s and can accelerate at a maximum rate of 5.00 m/s2 as it comes to rest. (a) From the instant the…
 updated one year ago
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tom0108:
. A baseball is hit so that it travels straight upward after being struck by the bat. A fan observes that it takes 3.00 s for the ball to …
 updated one year ago
 5 replies
 1 Medal

tom0108:
A jet plane has a takeoff speed of vto = 75 m/s and can move along the runway at an average acceleration of 1.3 m/s2. If the length of the …
 updated one year ago
 15 replies
 1 Medal

tom0108:
. A ball is thrown directly downward with an initial speed of 8.00 m/s, from a height of 30.0 m. After what time interval does it strike t…
 updated one year ago
 4 replies
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tom0108:
F=G Mm/r^2. Where F is the gravitational force, M and m are masses, and r is a length. Force has the SI units kg *m/s2. What are the SI u…
 updated one year ago
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tom0108:
: (a) ½mv2 = ½mv02 + √mgh, (b) v = v0 + at2, (c) ma = v2. . Do a dimensional analysis of each equation and explain why the equation can’t…
 updated one year ago
 2 replies
 1 Medal

tom0108:
The speed of light is now defined to be 2.99792458 * 108 m/s. Express the speed of light to (a) three significant figures, (b) five signifi…
 updated one year ago
 5 replies
 2 Medals
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