You and your friend Peter are putting new shingles on a roof pitched at 25 ∘ . You're sitting on the very top of the roof when Peter, who is at the edge of the roof directly below you, 5.4 m away, asks you for the box of nails. Rather than carry the 2.5 kg box of nails down to Peter, you decide to give the box a push and have it slide down to him.  If the coefficient of kinetic friction between the box and the roof is 0.50, with what speed should you push the box to have it gently come to rest right at the edge of the roof?

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Q: (c) If the time of contact between the balls is 0.03 s, what is the force exerted by the heavier…

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Q: A pickup truck is moving at 25 m/s with a toolbox of mass m resting on the bed of the truck 2.8 m…

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Q: 20. During a stormy season, winds can move horizontally at 30 m/s. If air strikes a person at the…

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Q: In a ballistics test, a 28-g bullet pierces a sand bag that is 30 cm thick. If the initial bullet…

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Q: WR = 30 m/s mHA = 5000 kg m, = 150 kg ►VHA = 200 m/s h=10000

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Q: One of the first ion engines on a commercial satellite used Xenon as a propellant and could eject…

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Q: A 140 g ball is thrown with a speed of 50 m/s. If it takes 1.5 s for the ball to come to rest in the…

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Q: A friend on skis stands still on level ground, covered with dry snow at 08 C. How hard would you…

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Q: You catch a ball of mass 100 g moving at a rate of 15 m/s in 0.1 s. What is the magnitude of the…

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Q: (2.a) In the figure shown, find the net force on block B (Neglect friction) F= 60 A в 2 kg 5 kg 8 kg…

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A: Using Newton's second law of motion, F=ma

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Q: A 13 g bullet pierces a sand bag 32 cm thick. If the initial velocity of the bullet was 68 m/s and…

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Q: Force Vectors Use interior String Number Mass Attached (kg) Force Exerted (N)  Direction (°) 1…

A: given:mass m1=250g = 0.250 Kgmass m2 = 250 g = 0.250 Kgmass m3 =350 g = 0.350 Kg direction: from…

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Q: A baseball has a terminal speed of 42 m/s in air (ρ = 1.2 kg/m3). What would be its terminal speed…

A: Solution:We know that the terminal speed of an object in a fluid is given as:v= 2 mgρACwhere, m is…

Q: One of the first ion engines on a commercial satellite used Xenon as a propellant and could eject…

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Q: (d) Suppose you use a spring to launch a payload horizontally from the asteroid so that the payload…

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Q: a. What net external force is exerted on a 1150.0 kg artillery shell fired from a battleship if the…

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Q: E. A parcel of mass 20 kg is placed on the floor of a lift, Taking g as 10 m s²², the reaction of…

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Q: Dr. Jekyll (m = 70kg) is riding a skateboard when he realizes the cranberry juice he’s drinking is…

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Q: The metal head of a hammer is loose. To tighten it, you drop the hammer down onto a table. Should…

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Q: What is the reduced mass of an arbitrary two bodied system where m1=7.87 and m2=36.791.

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Q: A 5-cm-diameter horizontal jet of water with a velocity of 40 m/s relative to the ground strikes a…

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Q: e) A bird of mass 0.50 kg hovers by beating its wings of effective area 0.30 m2 O What is the upward…

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Q: Let us make the (unrealistic) assumption that a boat of mass m gliding with initial velocity v, in…

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Q: The velocity of a 3.00 kg particle is given by v = (8.00t + 3.00t2 ) m/s, with time t in seconds. At…

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Q: A hockey player slaps a puck into a cushion, which brings the puck to rest.  If the puck's initial…

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Q: a) What net external force is exerted on a 1100.0-kg artillery shell fired from a battleship if the…

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Newton's Second Law

Newton’s laws of motion describe the relationship between the motion of an object and forces acting on it. Newton’s law of motion has two types as follows: