A 1200 kg car going 30 m/s applies its brakes and skids to rest. If the friction force between the sliding tires and the pavement is 6000 N, How far does the car skid before coming to rest? choices: a. 90 cm b. 90 mm c. 90m d. 9m -A 4 kg object is lifted 1.5 m. a) How much work is done against the earth's gravity? b) Repeat if the object is lowered instead of lifted. choices: 1. a.) 59 J b.) -59 J, 2. a.)-69 J b.)69J, 3. a.)79J b.)-79J, 4. None of the above

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