Physics

A child pushes a toy box 4.0m along the floor with the force of 6.00 N directed downward at an angle 37 degrees to the horizontal.
a. How much work does the child do?"
b. Would you expect more or less work to be done if the child pulled upward at the same angle?


Work is force*distance *CosTheta where Theta is the angle between the distance direction and the force vector. Later on, you will use something called the DOT product, which is a vector function. Work = force dot distance.

Work= 6*4*Cos37

Ignoring friction, there is no difference in up or down. Including friction, pushing downward increases the friction force...think this out.

  1. 👍 0
  2. 👎 0
  3. 👁 376

Respond to this Question

First Name

Your Response

Similar Questions

  1. Science-Enr. Phys.

    A box of books weighing 325 N moves at a constant velocity across the floor when the box is pushed with a force of 425 N exerted downward at an angle of 35.2 degrees below the horizontal. Fink Mu,k between the box and the floor.

  2. physics

    A box of books weighing 319 N is shoved across the floor by a force of 485 N exerted downward at an angle of 35 degrees below the horizontal. a. If 'uk' between the box and the floor is 0.57, how long does it take to move the box

  3. physics

    A 50-kg box is being pushed a distance of 6.4 m across the floor by a force P with arrow whose magnitude is 154 N. The force P with arrow is parallel to the displacement of the box. The coefficient of kinetic friction is 0.24.

  4. physics

    A large box whose mass is 20 kg rests on a frinctionless floor. A mover pushes on the box with a force of 250 N at an angle of 35 degrees below the horizontal. What is the acceleration of the box across the floor?

  1. Physics

    A 54 kg box is being pushed a distance of 7.0 m across the floor by a force P whose magnitude is 153 N. The force P is parallel to the displacement of the box. The coefficient of kinetic friction is 0.25. Determine the work done

  2. physics multiple choice

    A person pushes horizontally with constant force P on a 230 N box resting on a frictionless horizontal floor. Which of the following statements about this box is correct? A.The box will accelerate no matter how small P is. B. The

  3. Physics

    You drag a heavy box along a rough horixontal floor by a horizontal rope. Identify the reaction force to each ofthe follwing forces: A) the pull of the tope on the box. B) the friction force on the box C) the normal force on the

  4. physics

    A child's toy consists of a piece of plastic attached to a spring, as shown below. The spring is compressed against the floor a distance 1.8 cm and released. If the spring constant is 107 N/m, what is the magnitude of the spring

  1. Physics

    1. A worker pulls horizontally on a crate across a rough horizontal surface, causing it to move forward with constant velocity. Force A is the force exerted by the worker and force B is the force of friction due to the surface.

  2. Physics

    A man pushes with a force of 310 N on a box at an angle of 55 degrees to the floor. How much of the force is directed into the floor, making his job more difficult? 178 N(my choice) 254 N 300 N 150 N

  3. physics

    A manager of a restaurant pushes horizontally with a force of magnitude 150 N on a box of melons. The box moves across the floor with a constant acceleration in the same direction as the applied force. Which statement is most

  4. Physics

    A toy chest and its contents have a combined weight of W = 180 N. The coefficient of static friction between toy chest and floor μs is 0.440. The child in Fig. 6-35 attempts to move the chest across the floor by pulling on an

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