Conservation laws can be used even when the details of what is occurring inside a system aren't known.
a. True
b. False
Indicate whether the statement is true or false
[Ques. 2] An aircraft starts at rest and is accelerated at 10 m/s2 for 30 seconds, at which time the aircraft becomes airborne. What is the distance traveled during the 30 seconds? Assume the acceleration is constant.
[Ques. 3] A satellite orbits the Earth at a distance of 10,000 miles from the Earth's center. At this distance the force of gravity on the satellite is 90 lbs. (a) What would the force on the satellite be if the distance were 5,000 miles instead? (b) At what distance from the Earth's center would the force on the same satellite be 10 lbs?
[Ques. 4] A child on a merry-go-round is moving with speed 4 m/s in a circle with radius 2 m. If the child's mass is 30 kg, what is the centripetal force?
[Ques. 5] A certain speed boat weighs 4,900 N. It can accelerate from 0 to 20 m/s in 5 seconds. (a) What is the mass of the boat? (b) What is the acceleration? (c) How large is the net force acting on the boat?
[Ques. 6] A 3,000 kg truck experiences a net force of 2,000 N. What is its acceleration?
[Ques. 7] A ball rolling down a hill has a constant acceleration of 3 m/s2 . If the ball's mass is 2.5 kg, what is the net force acting on the ball?
[Ques. 8] Find your own weight in newtons.
[Ques. 9] A steel ball has a mass equal to 5 kilograms. What is the ball's weight?
[Ques. 10] An object is dropped from a tall building. The net force acting on the object is the difference between the object's _________ and the force of air resistance.
Fill in the blank(s) with correct word
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