To Understand How Points Are Awarded Read The Grading Policy For This Assignment Item 1 Part A A Football Player At Pra 1 (35.6 KiB) Viewed 45 times
To Understand How Points Are Awarded Read The Grading Policy For This Assignment Item 1 Part A A Football Player At Pra 2 (19.82 KiB) Viewed 45 times
To Understand How Points Are Awarded Read The Grading Policy For This Assignment Item 1 Part A A Football Player At Pra 3 (27.45 KiB) Viewed 45 times
To understand how points are awarded, read the Grading Policy for this assignment Item 1 Part A A football player at practice pushes a 80 kg blocking sted across the field at a constant speed. The coefficient of kinetic friction between the grass and the sled is 0.30. How much force must he apply to the sled? ANSWER: Item 2 24 N 80 N 240 N 780 N Mountain goats can easily scale slopes angled at 60" from horizontal. Part A What is the normal force acting on a mountain goat that weighs 950 N and is standing on such a slope? Express your answer with the appropriate units. ANSWER: 71 = Part B What is the static friction force acting on a mountain goat that weighs 950 N and is standing on such a slope? Express your answer with the appropriate units. ANSWER:
The acceleration of a baseball pitcher's hand as he delivers a pitch is extreme. For a professional player, this acceleration phase lasts only 50 ms, during which the ball's speed increases from 0 to about 90 mph, or 40 m/s. Part A What is the force of the pitcher's hand on the 0.145 kg ball during this acceleration phase? Express your answer with the appropriate units. ANSWER: Item 4 A 32 kg child goes down a straight slide inclined 38° above horizontal. The child is acted on by his weight, the normal force from. the slide, and kinetic friction. Part A
72 = Sk Item 5 JK 7 38% 38° Jk 38° 38° 38° Part B How large is the normal force of the slide on the child? Express your answer with the appropriate units. ANSWER:
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