1- A mass of an object is 104.81 (in grams). What is its weight in Newtons? (Hin

Question

1- A mass of an object is 104.81 (in grams). What is its weight in Newtons?

(Hint: Use three significant digits for the acceleration of gravity)

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2- If the hypotenuse of a right triangle is 19.46 cm long, and the opposite is 5.06 cm. What is the angle facing the opposite in radians?-

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3- If the hypotenuse of a right triangle is 19.85 cm long, and the adjacent is 11.22 cm. What is the angle between them in radians?

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4- Two forces are acting on an object. The magnitudes of them are F1= 29 N, F2=27 N. If a third force F3 is applied on the object, what is the smallest magnitude of F3 (in newtons) needed to balance the first two forces?

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6- Three forces are pulling on a point at the origin: 14.22 N at 0°, 4.24 N at 90°, and 3.86 N at 217°. Find x component of the resultant force.

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7- In this experiment, You calculated that the tension to hold up a traffic light is 2.3 N. You measured 2.53 N. What is the percent error?

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8- In part 3 and 4, we will measure the traffic light problems using two different mass values and one string angle.

true or false

Explanation / Answer

1. m = 104.81 g = 0.10481 kg

W = mg = 0.10481 x 9.8 = 1.027 N

2. sin@ = height ../ hypotenuse

sin@ = 5.06 / 19.46

@ = 15.07 deg

3. cos@ = 11.22 / 19.85

@ = 55.58 deg

4. F3 will be smallest when F1 and F2 will act in opposite direction.

when F1 and F2 are in opposite then

their equivalent force, F12 = F1 - F2 = 29-27 = 2 N

hence F3 = 2 N

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