Only question 4.9 4.12 Consider a rifle and bullet identical to those of the previous problem, butsuppose there is dirt inside the rifle that pushes against the bullet, such that itemerges from the rifle with a speed of 100.0 m/s. With what force does the dirt4.13 A simple elevator can be made from a box being pulled upward by a(a) If the mass of the box and ito4.5. PROBLEMS163(b) If the speed of the wagon remains constant, what are the magnitude anddirection of the resistive forces (mainly friction) which act on the wagon?4.9 A 5.0 N force is applied to a 2.0 kg block on a frictionless surface. Theblock is initially at rest.vasenngeWhat is the block's kinetic energy after being pushed for 20.0 cm?What is the block's velocity after being pushed for 20.0 cm?morth.plan:Ten(c) If the block's velocity at the end of 20.0 cm was only half of your answerfrom part (b), what is the frictional force (magnitude and direction) thatacts on the block?when4.10 Repeat the previous problem, but with the block beginning with a ve-traveslocity v = 0.5 m/s. Then repeat the previous problem again, but with the blockat is thebeginning with a velocity of v = -0.5 m/s (i.e., moving in the opposite directionof the force applied).when itswith what force was the bullet pushed as it was accelerated inside the rifle? How411 A 100-gram bullet leaves a 0.7-meter-long rifle with a speed of 150.0 m/s.a stopnuch time did it take for the bullet to leave the rifle?the mittpush against the bullet?Section 4.2cable.box andlu woight of thehockeystick remthe puck

Given that:- Mass of block=2kg Force applied on the block=5N

.. 4.9 A 5.0 N force is applied to a 2.0 kg block on a frictionless surface. The block is initially at rest. (a) What is the block's kinetic energy after being pushed for 20.0 cm? (b) What is the block's velocity after being pushed for 20.0 cm? (c) If the block's velocity at the end of 20.0 cm was only half of your answer from part (b), what is the frictional force (magnitude and direction) that acts on the block?

.. 4.9 A 5.0 N force is applied to a 2.0 kg block on a frictionless surface. The block is initially at rest. (a) What is the block's kinetic energy after being pushed for 20.0 cm? (b) What is the block's velocity after being pushed for 20.0 cm? (c) If the block's velocity at the end of 20.0 cm was only half of your answer from part (b), what is the frictional force (magnitude and direction) that acts on the block?

Classical Dynamics of Particles and Systems

5th Edition

ISBN:9780534408961

Author:Stephen T. Thornton, Jerry B. Marion

Publisher:Stephen T. Thornton, Jerry B. Marion

Chapter2: Newtonian Mechanics-single Particle

Section: Chapter Questions

Problem 2.51P: Let us make the (unrealistic) assumption that a boat of mass m gliding with initial velocity v0 in...

See similar textbooks

Similar questions

A skydiver is at an altitude of 1520 m. After 10.0 seconds of free fall, he opens his parachute and finds that the air resistance, FD , is given by the formula FD = −bv, where b is a constant and v is the velocity. If b = 0.750, and the mass of the skydiver is 82.0 kg, first set up differential equations for the velocity and the position, and then find: (a) the speed of the skydiver when the parachute opens, (b) the distance fallen before the parachute opens, (c) the terminal velocity after the parachute opens (find the limiting velocity), and (d) the time the skydiver is in the air after the parachute opens.
A little toy car is powered by a CO2 cartridge that produces a thrust force according to the following function: Fthrust(t) = 6.0N e-0.2t. The car also has a friction coefficient of 0.05 due to the wheels and bearings. If the car's mass is 1.2kg, and the car travels in the +x direction, what will it's acceleration function look like as a function of time? If it starts from rest, what will vx(t) be? How fast will the car be going after 3.0s? What maximum speed will be reached by the car?
A 2 kg box is initially at rest on the smooth horizontal surface. When the box is subjected to horizontal force P= 4 N. Compute the following: What is the resulting acceleration of the box? ______________ How fast is the box moving after 1 second? _______________ How far has it moved after 1 second? ____________________
Neglecting air resistance, the escape speed from a certain planet for an empty space vehicle is 1.12E4 m/s.What is the corresponding escape speed for the fully loaded vehicle which has triple the mass of the empty one?
At the end of a roller coaster ride, the cars must slow to a stop, but the magnitude of the acceleration cannot exceed 1.3 g's. Given a car with a mass of 1,700 kg (including the passengers), what is the magnitude of the maximum allowable force (in N)?
It's a snowy day and you're pulling a friend along a level road on a sled. You've both been taking physics, so she asks what you think the coefficient of friction between the sled and the snow is. You've been walking at a steady 1.5m/s1.5m/s, and the rope pulls up on the sled at a 24 ∘∘ angle. You estimate that the mass of the sled, with your friend on it, is 58 kgkg and that you're pulling with a force of 84 NN .
Let us make the (unrealistic) assumption that a boat of mass m gliding with initial velocity v0 in water is slowed by a viscous retarding force of magnitude bv2, where b is a constant, (a) Find and sketch v(t). How long does it take the boat to reach a speed of v0/l000? (b) Find x(t). How far does the boat travel in this time? Let m = 200 kg, v0 = 2 m/s, and b = 0.2 Nm-2s2.
A 3.69x103 kg train is moving at a constant speed of 10m/s on a horizontal railroad track that offers an overall frictional force of 500N. Calculate (a) it's acceleration, (b) the engine force, (c) the distance traveled in 20 seconds, (d) its acceleration if it changes its speed to 30 m/s, (e) the engine force in this case?
A fisherman is fishing from a bridge and is using a "30.0-N test line." In other words, the line will sustain a maximum force of 30.0 N without breaking. What is the weight of the heaviest fish that can be pulled up vertically, when the line is reeled in (a) at constant speed and (b) with an acceleration whose magnitude is 2.16 m/s2?
A 4.0kg object is moving across a friction-free surface with a constant velocity of 2ms–1. How much the horizontal forces is needed to maintain this state of motion?
In the example of a box on a horozontal frictionless floor, if I push the 2kg box with 20 N of force, what is the acceleration of the box?
a. what is the force of gravity berween two 1000 kg-cars separated by a distance of 25 m on an interstate highway? b. how does this force compare with the weight of a car?