(6%) Problem 13: A hammer of mass m = 0.465 kg is moving horizontally at a...
(e) A 0.55 kg hammer is moving horizontally at 7.1 m/s when it strikes a nail and comes to rest after driving the nail 0.012 m into a board. What is the duration (in seconds) of the impact? Keep 2 Non-zero digits in the decimal. (Hint: use 1D kinematics) Calculate the magnitude of the average force (in Newtons) on the hammer using the Impulse-Mometum theorem Calculate the magnitude of the average force (in Newtons) on the hammer using the work...
A 0.950 kg hammer is moving horizontally at 9.50 m/s when it strikes a nail and comes to rest after driving it 1.00 cm into a board. (a) Calculate the duration of the impact. s (b) What was the average force exerted on the nail? N
A hammer of mass M is moving at speed v_0 when it strikes a nail of negligible mass that is stuck in a wooden block. The hammer is observed to drive the nail a distance L deeper into the block. Find the work W done on the hammer by the nail. Express your answer as a function of F and L, where F is the force the nail exerts on the hammer. Don't forget to consider the sign of your...
A 0.400 kg hammer is moving horizontally at 7.50 m/s when it strikes a nail and comes to rest after driving it 1.00 cm into a board. (a) Calculate the duration of the impact. (b) What was the average force exerted on the nail? Additional Materials Reading 12. -12 points OSColPhys1 8.P.002.WA. Two carts mounted on an air track are moving toward one another. Cart 1 has a speed of 0.8 m/s and a mass of 0.53 kg. Cart 2...
8. A 12 kg hammer strikes a nail with a velocity of 8.5 m/s, and comes to rest after 8.0 ms. a. What is the impulse from the hammer on the nail? ans. 1.0 x 10' Nis b. What is the average force on the hammer, from the nail (with the appropriate sign)? ans. -13 KN
A drop hammer of mass 120 kg falls 2.5 m onto a pile of mass 250 kg and drives it 70 mm into the ground. Calculate: The velocity with which the hammer strikes the pile (use the conservation of energy principle) The velocity immediately after the impact(use the conservation of momentum principle, assuming the hammer does not rebound on impact) The average ground resistance (use work-energy method)
A cruise ship with a mass of 1.1 × 107 kg strikes a pier at a speed of 0.65 m/s. It comes to rest over a distance of 5.9 m, damaging the ship, the pier, and the tugboat captain’s finances. Assume a constant acceleration occurs during the collision. Find the average force Fsp being exerted on the pier as the ship hits it, in terms of the time of interaction Δt, the initial velocity of the ship v, and the...
(11%) Problem 4: A 82.5-kg person is riding in a car moving at 20.5 m/s (assume this is the positive direction) when the car runs into a bridge abutment. This problem will illustrate why the invention of the airbag dramatically improved the safety of automobiles. 50% Part (a) Calculate the horizontal component of the average force, in newtons, on the person if he is stopped by a padded dashboard that compresses an average of 1.25 cm. Grade Summary Fdash Deductions...
5. A mass m is moving horizontally along a nearly frictionless floor with velocity v. The mass now encounters a part of the floor that has a coefficient of kinetic friction given by u. The total distance traveled by the mass before it is slowed by friction to a stop is given by (A) 2v2 lug (B) v2 /2018 (C) 2ugu? (D) HU2/2g zas=v²_v²
(6%) Problem 8: A 0.240-kg billiard ball that is moving at 3.2 m/s in the positive direction strikes the bumper of a pool table and bounces straight back at 2.2 m/s. The collision lasts 0.0150 s. A 33% Part (a) Calculate the component of the average force along the direction of the original motion, in newtons, that is exerted on the ball by the bumper during the collision. A 33% Part (b) What is the change in kinetic energy, in...