6719

Physics Kinematics Level: Misc Level

How much faster is a car final speed if you double the gravitional acceleration?


6718

Physics Kinematics Level: Misc Level

If you add 2 m/s to a car,s starting speed would it increase the finalspeed by 2 m/s? should it?explain.


6717

Physics Kinematics Level: Misc Level

If you can build a roller coaster to demonstrate acceleration can youbuild one in which the rider feels a lot of acceleration?explain.


6355

Physics Kinematics Level: Misc Level

An object is dropped from a helicopter.When it reaches terminal velocity:Gravity no longer acts upon it,all of the upward forces add up to zero, the total force is zero, the acceleration of gravity, g , beconmes 0, the acceleration finally reaches g


6354

Physics Kinematics Level: Misc Level

The acceleration due to gravity is 9.8 m/s squared everywhere on earth.True or False


6351

Physics Kinematics Level: Misc Level

A Motorist travels for 3.o h at 80.0 km/h and 4.0 h at 60.0 km/h. What is her average speed for the trip?


6350

Physics Kinematics Level: Misc Level

A Car travels at 40 km/h for 30 min and 60 km/h for 15 min. How Far does it travel in this time?


6349

Physics Kinematics Level: Misc Level

A Plane flying horizontally at a speed of 50 m/s and at an elevation of 160 m drops a package of supplies. Two seconds later it drops a second package. How Far apart will the two packages land on the ground?


6347

Physics Kinematics Level: Misc Level

A stone is thrown horizontally with an initial speed of 7.5 m/s from the edge of a cliff. A Stopwatch measures the stones trajectory time from the top of the cliff to the bottom to be 2.5 s. What is the height of the cliff?Assume gravitional acceleration is 9.8 m/s squared.


6152

Physics Kinematics Level: Misc Level

an object is thrown directly downward from the top of  a very tall building. thespeed of the object just as it is releases is 27.3 m/s. after being thrown, the object falls freelly due to gravity. neglect air resistance and calculate the distance, in meters which the object covers between times t1=2.47 and t2=5.49 s after it is thrown.

a) 123 b) 139 c) 157 d)177 e)200 f) 226 g) 256 h) 289


6139

Physics Kinematics Level: Misc Level

Can an object have zero acceleration and non-zero velocity at the same time? Give examples.


6137

Physics Kinematics Level: Misc Level

An object that is thrown vertically upward will return to its original position with the same speed it had initially if air resistance is negligible. If air resistance is appreciable, will this result be altered, and if so, how? (Hint: the accleration due to air resistance is always in the direction opposite to the motion.)


6136

Physics Kinematics Level: Misc Level

When an object moves with constant velocity, does its average velocity during any time interval differ from its instenous velocity at any instant? Please elaborate.


5892

Physics Kinematics Level: Misc Level

3.48 A seagull flies at a velocity of 9.00 m/s2 straight into the wind.a) if it takes the bird 20.0 min to travel 6.00 km relative to earth, what is the velocity of the wind?


5891

Physics Kinematics Level: Misc Level

A ranger in a national park is driving at 27.4 mi/hr when a deer jumps into the road of the vehicle. After a reaction time of t the ranger applies the brakes to produce an acceleration of -8.96 ft/s^2. What is the maximum reaction time allowed if she is to avoid hitting the deer? Answer in units of s


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