physics

a mass (m=2.00kg) is traveling at an initial speed of 18.0m/s. find the force needed to bring the mass to rest in a distance of 45.0m----what equation to use??

  1. 👍 0
  2. 👎 0
  3. 👁 165
  1. force*distance=1/2 m v^2

    force= 1/2 *1/45.0 * 2.00*18.0^2 Newtons

Respond to this Question

First Name

Your Response

Similar Questions

  1. physics

    When two objects of unequal mass are hung vertically over a frictionless pulley of negligible mass, as shown below, the arrangement is called an Atwood machine. Determine a) the magnitude of the acceleration of the two objects and

    asked by michael on February 11, 2012
  2. Physics

    A constant force is exerted for a short time interval on a cart that is initially at rest on an air track. This force gives the cart a certain final speed. Suppose we repeat the experiment but, instead of starting from rest, the

    asked by Kim on February 6, 2015
  3. physics

    A little red wagon with mass 8.00 moves in a straight line on a frictionless horizontal surface. It has an initial speed of 3.80 and then is pushed 4.7 in the direction of the initial velocity by a force with a magnitude of 10.0 .

    asked by Anonymous on April 11, 2013
  4. physics multiple choice

    A force F is required to push a crate along a rough horizontal floor at a constant speed V with friction present. What force is needed to push this crate along the same floor at a constant speed 3V if friction is the same as

    asked by andrea on February 2, 2011
  1. physics

    Two packing crate of masses 10.0kg and 5.00kg are connected by a light string that passes over a frictionless pulley .the 5.00kg crate lies on a smooth incline of angle 40.0 degree find acceleration of the 5.00kg crate and the

    asked by rose on May 15, 2012
  2. physics

    Two masses are hung are connected by a light cord and hung from a frictionless pulley of negligible mad are shown. Mass m1=3.00kg and mass m2=2.00kg. When the two masses are released from rest, the resulting acceleration of the

    asked by Kam on March 28, 2014
  3. Physics

    A 2.50g bullet, traveling at a speed of 425m/s, strikes the wooden block of a ballistic pendulum. The block has a mass of 270g (a) find the speed of the bullet/block combination immediately after the collision (b) how high does

    asked by CJ on March 2, 2007
  4. Physics

    A car with a mass of 1700 kg is traveling directly northeast (45 degrees between north and east) at a speed of 14m/s (31mph), and collides with a smaller car with a mass of 1300kg that is traveling directly south at a speed of

    asked by Anonymous on April 2, 2011
  1. Physics

    An alpha particle (charge +2e and mass 6.64 x10-27 kg) is traveling to the right at 1.50 km/s. What uniform electric field (magnitude and direction) is needed to cause it to travel to the left at the same speed after 2.65 s.?

    asked by Anonymous on March 10, 2013
  2. Physics

    A mass m is traveling at an initial speed of v0 = 25.0 m/s. It is brought to rest in a distance of 62.5 m by a force of 15.0 N. The mass is? Could you just enlighten me on what formula to use please.... little lost although I

    asked by Femfatal on February 13, 2011
  3. physics

    A car traveling at 53 km/h hits a bridge abutment. A passenger in the car moves forward a distance of 65 cm (with respect to the road) while being brought to rest by an air bag. What magnitude of foce (assume constant) acts on the

    asked by Lars on November 12, 2006
  4. college physics

    When two objects of unequal mass are hung vertically over a frictionless pulley of negligible mass, as shown below, the arrangement is called an Atwood machine. Determine a) the magnitude of the acceleration of the two objects and

    asked by lacrosse on February 11, 2012

You can view more similar questions or ask a new question.