A body weighs 1000 lbf when exposed to a standard earth gravity g = 32.174 ft/s 2 . ( a ) What is its mass in kg? ( b ) What will the weight of this body be in N if it is exposed to the moon’s standard acceleration g moon =1.62 m/s 2 ? (c) How fast will the body accelerate if a net force of 400 lbf is applied to it on the moon or on the earth?

70 Energy (Joule) ☎ 8 8 8 8 8 8 50 30 10 o S2FRT820 $2FRT730 AS2FRT650 S2HT940 o $2HT1150 0 -200 -150 S2FRT820 O -100 + S2HT940 A -50 0 Temperature (°C) O O S2FRT730 ... S2FRT650 $2HT1150 50 100 The figure shown corresponds to the absorbed energy of different ferritic steels in a temperature range of 1. What is the ductile-brittle transition temperature of S2FRT730 steel? 2. If a component will work at -50°C, what materials (from those shown) would you use to manufacture it? EXPLAIN YOUR ANSWER.

20. Two objects are connected to each other by a rope over a pulley as in the figure. The 8.00 kg and mp = 11.0 kg. If initially ma is at rest 1.36 m from the masses are mA= edge of the table, how long does it take to reach the edge of the table if the system is allowed to move freely (i.e. with no friction)? Mg (c) 1.97 s (a) 12.3 s (d) 0.692 s (b) 0.413 s (e) 5.38 s

Q3. In the image shown below, according to the provided datum line, determine the gravitational potential energy of the 5.9-kg block. The radius r = 2.6 m and the angle 0 = 29°. Negative sign must be included if the energy is negative. Please pay attention: the numbers may change since they are randomized. Your answer must include 1 place after the decimal point, and proper SI unit. Take g = 9.81 m/s². Your Answer: Answer Ө units Datum

When an automobile moves with constant velocity, the power developed in a certain en- gine is 91.9 hp. What total frictional force acts on the car at 36.1 mi/h? 1 hp 746 W and 1 m/s = 2.2374 mi/h. Answer in units of N. =