l T-Mobile LTE 7:24 AM Done Attachment 1 of 5 Physics I Mechanics A Spring 2018
ID: 2033695 • Letter: L
Question
l T-Mobile LTE 7:24 AM Done Attachment 1 of 5 Physics I Mechanics A Spring 2018 13 Clearly circle the correct anwer, show eguations and work fa uravels east at constant velocity. The net force oe the car i b) west d) down 2) Yeu hang a 2 kg mass on a speing and it stresches by 15.0cm. Whot is the spring comstant of the spring? 0.0076 Nm c) 100 Nm d) 131 Nm c) 253 Nm 3) A 1000-kg elevator is rising and its speed is increasing at 3 m/$2, The net force experienced by the elevater 6800 N 000 N a) lau 9800 N e) 12800N A 700-k elevator accelerates dowrward at 3.0 ms The force of the cable on the clevator is (to 1 significat figure). 4) 21 kN, up 2.1 kN, dows 4.8 AN, up a. d) 4,8 N, down e) 90kN, up 5) fan ohjest moves with conatant acceleration, the velociky of the object mst c) d) e) be constant also. continually change by the same amount each second continually changes by varying amounts, depending on its speod continually decreases. none of these. 6) A bullet firod straight down from the top of a high cliff. Neglecting air resistance, the acceleration of the bullet once R leaves the gun is a) less thang b) E more than g depends on the mass of the bullet 7) Your weight is actually, your mass.Explanation / Answer
1) Ans: (e) zero
By Newton’s second law of motion, net force is given by:
F = ma
where m is the mass and a is the acceleration.
As the car is travelling with constant velocity, its acceleration is zero.
Thus F is zero.
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