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Finding acceleration and height given two times. one rock is dropped from a height 'h' and it takes 4.15s to reach the ground from a cliff and the second rock is thrown up 2m and then takes 6.3s to reach the ground, what is the hight of the cliff?
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Question: The particle travels along the path defined by the parabola y = 0.5x2. If the component of velocity along the x axis is vx = (7t) ft/s, where t is in seconds, determine the particle's distance from the origin O ...
Question: Ten days after it was launched toward Mars in December 1998, the Mars Climate Orbiter spacecraft (mass 629 kg) was 2.87x10^6 km from the earth and traveling at 1.20x10^4 km/hr relative to the earth. At this tim ...
Consider the roller coaster below in terms of speed. Where will it speed up and where will it slow down? From this consideration, make a sketch of a velocity-time graph for this image. Explain your graph. Post your sketc ...
A particle starts from the origin at t = 0 with an initial velocity having an x component of 26.6 m/s and a y component of -14.8 m/s. The particle moves in the xy plane with an x component of acceleration only, given by ...
Question: Why does a satellite in a circular orbit travel at a constant speed? a. There is no component of force acting along the direction of motion of the satellite. b. The net force acting on the satellite is zero. c. ...
A bullet is shot straight up into air from ground. It reaches maximum height = 757m. Calculate initial speed of bullet in m/s & using the results calculate total flight time t in seconds until the bullet reached the grou ...
Question: A sled and rider, gliding over horizontal, frictionless ice at 5.8 m/s, have a combined mass of 86 kg. The sled then slides over a rough spot in the ice, slowing down to 3.0 m/s. What impulse was delivered to t ...
After examining a cube-shaped object, explain, based on your observations, why Earth is not shaped like a cube? Describe 4 reasons with evidence to support each one.
Blue-green light has a frequency of about 6.00 x 10^14 Hz. Determine its wavelength. Compare this wavelength to the size of an atom (about 10^-10 m) by calculating the ratio: wavelength/(atom size).
A cheetah can run very quickly over short distances. Assume a cheetah has a constant velocity of 33.0 m/s and is approaching a gazelle that is initially at rest. When the cheetah is 90 m away, the gazelle begins to run w ...
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