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A fish swims 3.7 m [N] then 3.8 m [S]. What distance has the fish travelled?
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- The Moon is about 3.8 ✕ 108 m from Earth. Traveling at the speed of light, 3.0 ✕ 108 m/s, how long does it take a laser beam to go from Earth to the Moon and back again (in s)? The same physics was responsible for the noticeable delay in communications signals between lunar astronauts and controllers at the Houston Space Flight Center.A man 1.5 m tall walks towards a lamp post 3.05 m high at a speed of 1.05 m/s. how fast does his shadow shorten in m/s?A diver running 2.6 m/sm/s dives out horizontally from the edge of a vertical cliff and 3.1 ss later reaches the water below. How high was the cliff?
- (2) Two cars are 150 kilometres apart and travelling toward each other. One car is movng at 60 km/h and the other is moving at 40 km/h. In how many hours will they meet? A) 2.5 h B) 2.0 h C) 1.75 h D) 1.5 h E) 1.25 h 40 156km(The complete question is in the picture) A particle’s position r in time t was shown to be:r(t) = (t + sin t)ˆi + (t)ˆj + (2.00 [m]) kˆ.What is it’s velocity v and acceleration a at t = 5.00 [s]?A. v = (1.00 [m/s])ˆj,a = (0.0871 [m/s2])ˆiB. v = (1.28 [m/s])ˆi+(1.00 [m/s])ˆj,a = (0.959 [m/s2])ˆiC. v = (2.00 [m/s])ˆi−(0.09 [m/s])ˆj,a = (−0.959 [m/s2])ˆiD. v = (0.72 [m/s])ˆi+(1.00 [m/s])ˆj,a = (−0.959 [m/s2])ˆiData number y t t2 1 10m 4.28s 18.31s 2 20m 4.42s 16.32s 3 30m 3.78s 14.28s 4 40m 3.50s 12.25 5 50m 3.19s 10.17s 6 60m 2.86s 8.17s 7 70m 2.47s 6.10s The equation of distance as a function of time for a freely falling object is described, according to theory, by the equation: since (vi=0 , yi=0) y(t)= yi+vt*t+1/2*g*t2 Use the table for : make a plot of y(t) vs t2 , and then calculate the slope in order to find g (the acceleration due to gravity, which is 9.8 m/s2) find Slope = Δy / Δt2 g =