A girl is using a rope to pull a box of weight 300 N across a level surface at constant velocity. The rope makes an angle of 30 ° with the horizontal. The tension in the rope is 100 N. What is the normal force of the floor on the box?

A girl is using a rope to pull a box of weight 300 N across a level surface at constant velocity. The rope makes an angle of 30 ° with the horizontal. The tension in the rope is 100 N. What is the normal force of the floor on the box?

Physics for Scientists and Engineers, Technology Update (No access codes included)

9th Edition

ISBN:9781305116399

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter5: The Laws Of Motion

Section: Chapter Questions

Problem 5.8P: (a) A cat with a mass of 850 kg in moving to the right with a constant speed of 1.44 m/s. What is...

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Concept explainers

Angular speed, acceleration and displacement

Angular acceleration is defined as the rate of change in angular velocity with respect to time. It has both magnitude and direction. So, it is a vector quantity.

Angular Position

Before diving into angular position, one should understand the basics of position and its importance along with usage in day-to-day life. When one talks of position, it’s always relative with respect to some other object. For example, position of earth with respect to sun, position of school with respect to house, etc. Angular position is the rotational analogue of linear position.

Question

A girl is using a rope to pull a box of weight 300 N across a level surface at constant velocity. The rope makes an angle of 30
° with the horizontal. The tension in the rope is 100 N. What is the normal force of the floor on the box?
а. 350 N
b. 400 N
c. 250 N
d. 213 N
e. 200 N

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