# A rock is thrown straight down with an initial

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Question 35 (1 point)
A rock is thrown straight down with an initial velocity of 14.5 m/s from a cliff. What is the rock's displacement after 2.0 s? (Acceleration due to gravity is 9.80 m/s2.)
SaveQuestion 36 (1 point)If the displacement of an object is given in SI units by x-3 t+ 4 t2, at t= 2 s its velocity and acceleration are, respectively:=
SaveQuestion 37 (1 point)
A European sports car dealer claims that his product will accelerate at a constant rate from rest to a speed of 100 km/hr in 8.00 s. What is the speed after the first 5.00 s of acceleration? (Hint: First convert the speed to m/s.)
SaveQuestion 38 (1 point)Maria throws two stones from the top edge of a building with aspeed of 20 m/s. She throws one straight down and the other straight up. The first one hits the street in a time t1. How muchlater is it before the second stone hits?Question 38 options:1) 5 s2) 4 s3) 3 s4) 2 s
5) Not enough information is given to work this problem.
SaveQuestion 39 (1 point)A parachutist jumps out of an airplane and accelerates with gravity to a maximum velocity of 58.8 m/s in 6.00 seconds. She then pulls the parachute cord and after a 4.00-second constant deceleration, descends at 10.0 m/s for 60.0 seconds, reaching the ground. From what height did the parachutist jump?
SaveQuestion 40 (1 point)A European sports car dealer claims that his car will accelerateat a constant rate from rest to 100 km/hr in 8.00 s. If so, what is the acceleration? (Hint: First convert speed to m/s.)
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2SaveQuestion 41 (1 point)A truck moves 70 m east, then moves 120 m west, and finally moves east again a distance of 90 m. If east is chosen as the positive direction, what is the truck's resultant displacement?
SaveQuestion 42 (1 point)An automobile driver puts on the brakes and decelerates from 30.0 m/s to zero in 10.0 s. What distance does the car travel?Question 42 options:1) 150 m2) 196 m
3) 336 m4) 392 m5) 421 m
SaveQuestion 43 (1 point)The distance of the Earth from the sun is 93 000 000 miles. If there are 3.15 107s in one year, find the speed of the Earth in its orbit about the sun.
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