E) none of these Answer: Dġ7) A car accelerates at 2 meters/s/s. How deep is the shaft? A) about 60 m B) about 120 m C) about 180 m D) more than 200 m Answer: Cġ6) In each second of fall, the distance a freely falling object will fall is A) about 5 m. E) not enough information given to estimate Answer: Bġ5) It takes 6 seconds for a stone to fall to the bottom of a mine shaft. It hits the ground with a speed of about A) 5 m/s. Answer: Cġ4 E) not enough information given to estimate Answer: Bģ.1 Questions About Motion 14) An apple falls from a tree and hits the ground 5 meters below. E) 600 km/h/s.ġ3) If a rocket initially at rest accelerates at a rate of 50 m/s2 for one minute, its speed will be A) 50 m/s. D) always decrease.ġ2) If a car increases its velocity from zero to 60 km/h in 10 seconds, its acceleration is A) 3 km/h/s.
C) change by varying amounts depending on its speed. B) change by the same amount each second. D) more than 100 m/s.ġ1 11) If an object moves with constant acceleration, its velocity mustģ.1 Questions About Motion 11) If an object moves with constant acceleration, its velocity must A) be constant also. E) depends on its initial speedġ0) Twelve seconds after starting from rest, an object falling freely will have a speed of A) 10 m/s. E) depends on its initial speedģ.1 Questions About Motion 9) If a freely falling object were somehow equipped with a speedometer on a planet where the acceleration due to gravity is 20 m/s/s, then its speed reading would increase each second by A) 10 m/s.
D) doubled.ģ.1 Questions About Motion 8) If a freely falling object were somehow equipped with a speedometer, its speed reading would increase each second by about A) 5 m/s. C) greater than the second before.ģ.1 Questions About Linear Motion 7) If an object falling freely were somehow equipped with an odometer to measure the distance it travels, then the amount of distance it travels each succeeding second would be A) constant. D) 40 m/s.ħ B) less and less each second. If the acceleration there is twice that of the Earth, its speed one second later would be A) 10 m/s. D) equal to the product of its mass times its weight.Ħ) An object at rest near the surface of a distant planet starts to fall freely. C) equal to its weight divided by its mass. If ice friction and air resistance are neglected, the force required to keep the puck sliding at constant velocity is A) zero. D) mass decreases.ĥ C) equal to its weight divided by its mass.ģ.1 Questions About Linear Motion 5) A hockey puck is set in motion across a frozen pond.
D) 1000 km/hr.Ĥ 4) While an object near the Earth's surface is in free fall, itsģ.1 Questions About Linear Motion 4) While an object near the Earth's surface is in free fall, its A) velocity increases. During this interval its acceleration is A) zero. D) 40 km/h.ģ) A car maintains a constant velocity of 100 km/hr for 10 seconds. E) velocity and distance.Ģ) A horse gallops a distance of 10 kilometers in a time of 30 minutes. 1 The two measurements necessary for calculating average speed areģ.1 Questions About Linear Motion The two measurements necessary for calculating average speed are A) acceleration and time.