SAT阅读填空练习题｜附答案解析（十六）

2023-08-29 08:29:00来源：网络整理

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　　1.An object that’s moving with constant speed travels once around a circular path.True statements about this motion include which of the following?

　　A.The displacement is zero B. The average speed is zero

　　C. The acceleration is zero D. None of the above

　　2.Which of the following must always be true?

　　1.If an object’s acceleration is constant,then it must move in a straight line

　　2.If an object’s acceleration is zero,then its speed must remain constant

　　3.If an object’s speed remains constant,then its acceleration must be zero.

　　A.1 and 2 only B.1 and 3 only C.2 only D.3 only E.2 and 3 only

　　4.A frictionless inclined plane of length 20m has a maximum vertical height of 5m. If an object of mass 2 kg is planced on the plame . Which of the following best approximates the net force it feels?

　　A.5N B.10N C.15N D.20N E.30N

　　5.A person who weighs 800N steps onto a scale that is on the floor of an elevator car. If the elevator accelerates upward at a rate of 5 m/s, what will the scale read?

　　A.400N B.800N C.1000N D.1200N E.1600N

　　6.A person standing on a horizontal floor feels two forces: the downward pull of gravity and the upward supporting force from the floor. There two forces

　　A. have equal magnitudes and from an action /reaction pair

　　B. have equal magnitudes but do not from an action /reaction pair

　　C. have unequal magnitudes and from an action /reaction pair

　　D. have unequal magnitudes and do not from an action /reaction pair

　　E.None of the above

　　7.How long would it take a car,starting from rest and accelerating uniformly in a straight line at 5m/s,to cover a distance of 200m?

　　A.9s B 10.5s C.12.0s D.15.5s E.20.0s

　　8.A rock is dropped off a cliff and strikes the ground with an impact velocity of 30m/s.How high was the cliff?

　　A.15m B.20m C.30m D.45m E.60m

　　9.A soccer ball at rest on the ground,is kicked with an initial velocity of 10m/s at a launch angle of 30.Calculate its total flight time , assuming that air resistance is negligible.

　　A.0.5s B.1s C.1.7s D.2s E.4s

　　10.If all of the forces acting on an object balance so that the net force is zero , then

　　A.the object must be at rest

　　B. the object’s speed will decrease

　　C. the object will follow a parbolic trajectory

　　D. the object’s direction of motion can change,but its speed cannot

　　E.None of the above

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