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- An object with a mass of 1.58 kg is initially at rest upon a horizontal, frictionless surface. An applied force of 4.79 N i acts on the object for 2.94 s. What is the object's final speed? Enter a number rounded to 2 decimal places and assume the answer has proper SI Units.A stationary soccer ball of mass m = 0.52 kg is booted with a constant force of F = 22 N. The man's foot is in contact with the ball for t = 0.46 s. a. Write an expression for the speed of the ball, vi, as it leaves the man's foot. b. What is the velocity of the ball right after contact with the foot of the man? c. If the ball left the man's foot at an angle θ = 45° relative to the horizontal, how high h did it go in meters?A block of mass m = 2kg slides across a flat surface with friction present. If the block starts with a speed v = 3m/s, and slides 2.3m before coming to rest, what was the magnitude of the constant friction force that brought it to a stop? Group of answer choices
- Henry, whose mass is 95 kg, stands on a bathroom scale in an elevator. The scale reads 830 N for the first 3.8 s after the elevator starts moving, then 930 N for the next 3.8 s. What is the elevator's speed 7.6 s after starting?Using the alternate form of Newton's second law, compute the force (in N) needed to accelerate a 1,170 kg car from 0 to 24 m/s in 18 s. The change in momentum is the car's momentum when traveling 24 m/s minus its momentum when going 0 m/s. (Enter the magnitude.) ________________NMark swings a bucket filled with 2.5 kg of water over his head. The length of his arm is 0.52 meters. (a) What is the normal force of the bucket on the water when the bucket is over his head if Marknswings the bucket with a speed of 3 m/s? (b) What is the minimum speed that he has to swing the bucket so that the water doesn't fall on his head?
- A stationary soccer ball of mass m = 0.56 kg is kicked with a constant force of F = 28 N. The player's foot is in contact with the ball for t= 0.35 s. Part A) write an expression for the speed of the ball as it leaves the player's foot Part B) what is the velocity of the ball right after impact with the foot of the player? Part C)if the ball left the player's foot at an angle of 45 degrees relative to the horizontal, how high (h) did it go in meters?An object starts from rest at the origin and moves along the x axis subject to the force shown in the figure below. If the mass of the object is 37.0 kg, determine the speed of the object at the following positions. Each unit along the position axis is 2.00 m and each unit along the force axis is 3.00 N. (a) x = A (b) x = B (c) x = CAn Atwood machine consists of a massless string connecting two masses over a massless, frictionless pulley ( the figure on the left below ). The masses are 1.70 and 1.65 kg. The system is released from rest with the 1.7-kg mass 2.15 m above the floor and the 1.65-kg mass on the floor. (a) What is the acceleration of the 1.7-kg mass? Of the 1.65-kg mass? (b) What is the speed of the 1.7-kg mass just before it hits the floor? (c) How long does it take the 1.7-kg mass to reach the floor?
- Two friends are sitting in a stationary canoe. At t = 3.0 s the person at the front tosses a sack to the person in the rear, who catches the sack 0.2 s later. Which plot given shows the velocity of the boat as a function of time? Positive velocity is forward, negative velocity is backward. Neglect any drag force on the canoe from the water.Mr. Wharf accidentally fires two rockets on his shuttlecraft at the same time. The first rocket applies a force of 1000 N [E25°S], and the second rocket applies a force of 1200 N [N40°W]. If the shuttlecraft has a mass of 5.0 x 104 kg, determine the vector acceleration it will experience. [1.0 x 10-2 m/s2 [E75°N] please help answer this question and show all your work for solving the problemA soccer player kicks a stationary 0.425 kg ball giving it a speed of 13.7 m/s. The player’s foot is in contact with the ball for 0.097 second. What is the average force when the player kick the ball? a. 6 N b. 5.8 N c. 60 N d. 84 N
