when jumping straight down, you can be seriously injured if you land stiff-legged. One way to avoid injury is to bend your knees upon landing to reduce the force of the impact. A 75-kg man just before contact with the ground has a speed of 6.4 m/s. (a) In a stiff-legged landing he comes to a halt in 2.1 ms. Find the average net force that acts on him during this time. N

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A: Write the given values with the suitable variables. m=2 kgu1=5 m/su2=0 m/sθ=45° Here, m, u1, u2, and…

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Q: (a) |A bullet of mass 20g hits a block of wood at a speed of 380 m/s. The bullet penetrates a depth…

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Q: A man claims he can safely hold on to a 12.5-kg child in a head-on collision with a relative speed…

A: SOlution: Given that mchild = 12.5 kg v = 116 mi/h = 1161x160x60x16091 m/s v = 51.85 m/s ∆t = 0.13 s

Q: a) A car stopped at an intersection has a mass 850 kg. It is rear-ended by a 300 kg truck traveling…

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Q: A 2.5 kg ball strikes a wall with a velocity of 7.9 m/s to the left. The ball bounces off with a…

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Q: C. Suppose a block of mass 10 kg has an initial velocity of 2.5 m/s and slides across a horizontal…

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Q: A 29,000 kg freight car is coasting at 0.700 m/s with negligible friction under a hopper that dumps…

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Q: A 4.00 g bullet, traveling horizontally with a velocity of magnitude 400 m/s, is fired into a wooden…

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Q: A 22-g bullet traveling 280 m/s penetrates a 1.8 kg block of wood and emerges going 120 m/s. Part A…

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Q: n the figure, two long barges are moving in the same direction in still water, one with a speed of…

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Q: b) One scene of a movie has a 75.0-kg stuntman drop 5.5 on to a 25.0-kg platform attached to a…

A: mass of stuntman (m) = 75 kg mass of platform (M) = 25 kg Vertical drop in height (h) = 5.5 m Spring…

Q: In a typical golf swing, the club is in contact with the ball for about 0.0015 s. If the 45 g ball…

A: As we know that, impulse experienced by an object isequal to Force×time = F×t Also, momentum change…

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Q: Calculate the force (in N) needed to bring a 950 kg car to rest from a speed of 80.0 km/h in a…

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Q: (b) A 6000-kg truck travelling North at 18 kph collides with a 4,000-kg bus moving West at 54 kph.…

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Q: A 1120 kg car with no air bag collides with a railing traveling 21.9 m/s. The 62.5 kg driver, who is…

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Q: A 0.950 kg hammer is moving horizontally at 7.50 m/s when it strikes a nail and comes to rest after…

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Q: A 22-g bullet traveling 285 m/s penetrates a 2.0 kg block of wood and emerges going 140 m/s. Part A…

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Q: 1. During a snowball fight, a 0.20-kilogram snowball traveling at a speed of 10.0 m/s hits a student…

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