1) If a heavy rock is 15 kg, what is its weight? a) 147 N b) 147 kg c) 100 N 2) A skateboard is pushed 25 metres with a force of 140 N. How much work is being done to the skateboard? a) 5.6 J b) 5.6 N c) 3500 J 3) If a baseball has a mass of 18 kilograms, how much force would it take to lift the baseball 2 metres? a) 36 J b) 352.8 J c) 176.4 J 4) Isabella is pushing on a brick wall with a force of 180 N. How much work is being done to the wall? a) 1764 N b) 1764 J c) 0 J 5) How much work is required to lift a 30 kg barbell 1.5 m in the air? a) 30 J b) 441 J c) 45 J 6) What is the weight of an object that has a mass of 62 kg? a) 607.6 N b) 607.6 J c) 307. 6 N 7) 300 N of force is applied to a skateboard. If the skateboard has an output force of 575 N, what is the mechanical advantage of the skateboard? a) 172 500 b) 1.92 c) 0.52 8) If you apply an effort of 290 N to a simple machine with a mechanical advantage of 4, what output force will the machine produce? a) 72.5 N b) 0.01 N c) 1160 N 9) Tammy moves a 236 N laundry basket with 188 N of force using an inclined plane. What mechanical advantage does she have when using the inclined plane? a) 0.80 b) 44 368 c) 1.26 10) What is the weight of an object that has a mass of 56 kg? a) 548.8 N b) 6.22 N c) 56 N 11) If a dog weighs 325 N on Earth, what is its mass? a) 0.03 kg b) 33.16 kg c) 3185 kg

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