Concept explainers
Two forces,
Trending nowThis is a popular solution!
Chapter 5 Solutions
Physics for Scientists and Engineers
- According to a simplified model of a mammalian heart, at each pulse approximately 20 gg of blood is accelerated from 0.22 m/sm/s to 0.36 m/sm/s during a period of 0.11 ss . What is the magnitude of the force exerted by the heart muscle?arrow_forwardAccording to a simplified model of a mammalian heart, at each pulse approximately 20 g of blood is accelerated from 0.25 m/s to 0.35 m/s during a period of 0.10 s. What is the magnitude of the force exerted by the heart muscle?arrow_forwardA particle of mass 1.15 kg is subject to a force that is always pointed towards the East but whose magnitude changes linearly with time t. The magnitude of the force is given as F = (6 N/s)t. Let the x-axis point towards the East. (a) Determine the change in the velocity Δv, in meters per second, of the particle between t = 0 and t = 1.2 sec. (b) Determine the change in x-coordinate Δx, in meters, of the particle between t = 0 and t = 1.2 if the initial velocity is 12.6 m/s, and points in the same direction as the force.arrow_forward
- A 2.0 kg projectile with initial velocity v→ = 6.5i m/s experiences the variable force F→ = -2.0ti +4.0t2j N, where t is in s. What is the projectile's speed at t = 2.0 s? Also, at what instant of time is the projectile moving parallel to the y-axis?arrow_forwardTwo forces, F1 = (6.10î + 4.30ĵ) N and F2 = (3.40î + 7.65ĵ) N, act on a particle of mass 2.20 kg that is initially at rest at coordinates (+2.05 m, −4.50 m). (a) What are the components of the particle's velocity at t = 10.7 s? v= (in m/s)arrow_forwardA runner of mass 62.0 kg initially moves at a speed of 8.05 m/s.How long must an average external force of 1.60* 10^2 N act to bring the runner to rest?arrow_forward
- A wood block weighing 44.75 N rests on a rough horizontal plane, the coefficient of friction being 0.40.If a bullet weighing 0.25 N is fired horizontally into the block with a velocity of 600 m/s, how far will theblock be displaced from its initial position ? Assume that the bullet remains inside the block. A.1.41m B.0.89m C.2.06m D.1.98marrow_forwardTwo forces, F1 = (3.90î − 2.60ĵ) N and F2 = (3.65î − 8.05ĵ) N, act on a particle of mass 2.10 kg that is initially at rest at coordinates (+1.60 m, +3.50 m). (a) What are the components of the particle's velocity at t = 11.8 s? v = 42.362i−59.826j m/s (b) In what direction is the particle moving at t = 11.8 s? 305.30 2 (c) What displacement does the particle undergo during the first 11.8 s?Δr = 863.07 m is not correct answer (d) What are the coordinates of the particle at t = 11.8 s? x = 249 m y = -713.5 m is not correct answer Please give correct, complete, and detailed formulas for correctly solving these questions.arrow_forwardA 3.5 kg particle moves along an x axis according to x(t) = −12 + 5t2 − 4t3, with xin meters and t in seconds. In unit-vector notation, what is the net force acting on theparticle at t = 6 s?arrow_forward
- A loaded tractor-trailer with a total mass of 5500 kg traveling at 2.5 km/h hits a loading dock and comes to a stop in 0.56 s . What is the magnitude of the average force exerted on the truck by the dock?arrow_forwardA particle of mass 1.06 kg begins at rest and is then subject to a force in the positive x direction that changes with time as given by the following function: F = mg[1-e-2.1t ], where g is the acceleration due to gravity. Part (a) Determine the change in the velocity Δv of the particle between t = 0 and t = 2.4 sec. Part (b) Determine the change in x-coordinate of the particle Δx between t = 0 and t = 2.4.arrow_forwardA particle of mass 2.4 kg is subject to a force that is always pointed towards the North but whose magnitude changes quadratically with time. Let the y-axis point towards the North. The magnitude of the force is given as F = 6t2, and has units of newtons Determine the change in velocity Δv, in meters per second, of the particle between t=0 and t=1.3s. Determine the change in y coordinate, in meters, of the particle Δ y betweent=o and t=1.3 if the initial velocity= 15.9 m/s and directed North, in the same direction as the force.arrow_forward
- Physics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning