A bridge that was 8.3 m long has been washed out by the rain several days ago. How fast must a car be going to successfully jump the stream? Although the road is level on both sides of the bridge, the road on the far side is 2.0 m lower than the road on this side.
a. 5.0 m/s
c. 13 m/s
b. 7.8 m/s
d. 25 m/s
[Ques. 2] A stone is thrown with an initial speed of 15 m/s at an angle of 53 above the horizontal from the top of a 40-m building. If g = 9.8 m/s2 and air resistance is negligible, what is the magnitude of the horizontal displacement of the rock?
a. 30 m
c. 66 m
b. 39 m
d. 90 m
[Ques. 3] A stone is thrown with an initial speed of 15 m/s at an angle of 53 above the horizontal from the top of a 40-m building. If g = 9.8 m/s2 and air resistance is negligible, then what is the speed of the rock as it hits the ground?
a. 30 m/s
c. 34 m/s
b. 32 m/s
d. 36 m/s
[Ques. 4] A stone is thrown with an initial speed of 15 m/s at an angle of 53 above the horizontal from the top of a 40-m building. If g = 9.8 m/s2 and air resistance is negligible, then what is the magnitude of the horizontal component of velocity as the rock strikes the ground?
a. 7.5 m/s
c. 12 m/s
b. 9.0 m/s
d. 29 m/s
[Ques. 5] A stone is thrown with an initial speed of 15 m/s at an angle of 53 above the horizontal from the top of a 40-m building. If g = 9.8 m/s2 and air resistance is negligible, then what is the magnitude of the vertical velocity component of the rock as it hits the ground?
a. 30 m/s
c. 26 m/s
b. 24 m/s
d. 29 m/s
[Ques. 6] A stone is thrown at an angle of 30 above the horizontal from the top edge of a cliff with an initial speed of 14 m/s. A stop watch measures the stone's trajectory time from top of cliff to bottom to be 7.1 s. How far out from the cliff's edge does the stone travel horizontally? Note: g = 9.8 m/s2 and air resistance is negligible.
a. 58 m
c. 86 m
b. 68 m
d. 197 m
[Ques. 7] A stone is thrown at an angle of 30 above the horizontal from the top edge of a cliff with an initial speed of 14 m/s. A stop watch measures the stone's trajectory time from top of cliff to bottom to be 7.1 s. What is the height of the cliff? Note: g = 9.8 m/s2 and air resistance is negligible.
a. 58 m
c. 120 m
b. 114 m
d. 197 m
[Ques. 8] A ball is rolled horizontally off a table with an initial speed of 0.18 m/s. A stopwatch measures the ball's trajectory time from table to the floor to be 0.30 s. How far away from the table does the ball land? Note: g = 9.8 m/s2 and air resistance is negligible.
a. 0.054 m
c. 1.2 m
b. 0.072 m
d. 1.9 m
[Ques. 9] A ball is rolled horizontally off a table with an initial speed of 0.18 m/s. A stopwatch measures the ball's trajectory time from table to the floor to be 0.30 s. What is the height of the table? Note: g = 9.8 m/s2 and air resistance is negligible.
a. 0.11 m
c. 0.33 m
b. 0.22 m
d. 0.44 m
[Ques. 10] A helicopter is traveling at 54 m/s at a constant altitude of 100 m over a level field. If a wheel falls off the helicopter, with what speed will it hit the ground? Note: g = 9.8 m/s2 and air resistance is negligible.
a. 40 m/s
c. 60 m/s
b. 50 m/s
d. 70 m/s
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