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- A ski jumper starts from rest 50.0 m above the ground on a frictionless track and flies off the track at an angle of 45.0 above the horizontal and at a height of 10.0 m above the level ground. Neglect air resistance, (a) What is her speed when she leaves the track? (b) What is the maximum altitude she attains after leaving the track? (c) Where does she land relative to the end of the track?Two blocks, A and B (with mass 50.0 kg and 1.00 102 kg, respectively), are connected by a string, as shown in Figure P5.86. The pulley is frictionless and of negligible mass. The coefficient of kinetic friction between block A and the incline is k = 0.250. Determine the change in the kinetic energy of block A as it moves from to , a distance of 20.0 m up the incline (and block B drops downward a distance of 20.0 m) if the system starts from rest. Figure P5.86A stationary soccer ball of mass m = 0.76 kg is kicked with a constant force of F = 11 N. The woman's foot is in contact with the ball for t = 0.12 s. Write an expression for the speed of the ball vi as it leaves the womans foot. If the ball left the womans foot at at an angel of theta=45degrees relative to the horizontal, how high h did it go in meters?
- A 60.0 kg skier with an initial speed of 15 m/s coasts up a 2.50 m high rise as shown in the figure. a. Find her final speed right at the top, in meters per second, given that the coefficient of friction between her skis and the snow is 0.36.A 2.1 x 10-kg car starts from rest at the top of a 5.8-m-long driveway that is inclined at 15° with the horizontal. If an average friction force of 4.0 x 103N impedes the motion, find the speed of the car at the bottom of the driveway. Enter a number. differs from the correct answer by more than 10%. Double check your calculations. m/s Need Help? Read ItA 2.1 ✕ 103-kg car starts from rest at the top of a 5.3-m-long driveway that is inclined at 18° with the horizontal. If an average friction force of 4.0 ✕ 103 N impedes the motion, find the speed of the car at the bottom of the driveway. m/s
- A 2.1 x 103-kg car starts from rest at the top of a 5.5-m-long driveway that is inclined at 15° with the horizontal. If an average friction force of 4.0 x 103 N impedes the motion, find the speed of the car at the bottom of the driveway. 4.174 Your response differs from the correct answer by more than 10%. Double check your calculations. m/s Need Help? Read ItGayle runs at a speed of 3.20 m/s and dives on a sled, initially at rest on the top of a frictionless snow-covered hill. After she has descended a vertical distance of 5.00 m, her brother, who is initially at rest, hops on her back and together they continue down the hill. What is their speed at the bottom of the hill if the total vertical drop is med ocum 15.0 m? Gayle's mass is 49.5 kg, the sled has a mass of 5.45 kg and her brother has a mass of 30.0 kg. m/s Need Help? Read It gyA semitrailer is coasting downhill along a mountain highway when its brakes fail. The driver pulls onto a runaway-truck ramp that is inclined at an angle of 12.5° above the horizontal. The semitrailer coasts to a stop after traveling 120 m along the ramp. What was the truck's initial speed? Neglect air resistance and friction. so F m/s 3. due to Submit Answer one form o so But not no Bb P Type here to search bp 米 f4 IDI esc ? 10 f7 fg f10 @ # 24 & 1. 3 8. Q W E R T. Y tab
- A 60.0 kg skier with an initial speed of 13.0 m/s coasts up a 2.50 m high rise as shown in the following figure. Find her final speed at the top (in m/s), given that the coefficient of friction between her skis and the snow is 0.0800. (Hint: Find the distance traveled up the incline assuming a straight-line path as shown in the figure.)While a roofer is working on a roof that slants at 36.0 ∘∘ above the horizontal, he accidentally nudges his 89.0 NN toolbox, causing it to start sliding downward, starting from rest. If it starts 4.95 mm from the lower edge of the roof, how fast will the toolbox be moving just as it reaches the edge of the roof if the kinetic friction force on it is 17.0 NN?A 2.1 x 103 - kg car starts from rest at the top of a 5.0 - m - longdriveway that is inclined at 20.0° with the horizontal. If anaverage friction force of 4.0 x 103 N impedes the motion, findthe speed of the car at the bottom of the driveway.
