According to the Newton's second law, which of the following is TRUE about a person pushing a lawn mower? A The direction of the acceleration is the same direction as that of the force of friction, which is parallel to the ground. The force exerted by the person pushing the mower must be less than the friction opposing the motion. C The direction of the acceleration is the same direction as that of the net force, which is parallel to the ground. The net external force applied by the person is the push plus friction exerted on a lawn mower. ©2021 Illuminate Education TM, Inc. B.

According to the Newton's second law, which of the following is TRUE about a person pushing a lawn mower? A The direction of the acceleration is the same direction as that of the force of friction, which is parallel to the ground. The force exerted by the person pushing the mower must be less than the friction opposing the motion. C The direction of the acceleration is the same direction as that of the net force, which is parallel to the ground. The net external force applied by the person is the push plus friction exerted on a lawn mower. ©2021 Illuminate Education TM, Inc. B.

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter5: Newton's Law Of Motion

Section: Chapter Questions

Problem 21P: Two teenagers are pulling on ropes attached to a tree. The angle between the ropes is 30 . David...

See similar textbooks

Similar questions

A rocket sled accelerates at a rate of 49.0m/s2 . Its passenger has a mass of 75.0 kg. (a) Calculate the horizontal component of the force the seat exerts against his body. Compare this with his weight using a ratio. (b) Calculate the direction and magnitude of the total force the seat exerts against his body.
A 3.00-kg object undergoes an acceleration given by a=(2.00i+5.00j)m/s2. Find (a) the resultant force acting on the object and (b) the magnitude of the resultant force.
A 6.0-kg object undergoes an acceleration of 2.0 m/s2. (a) What is the magnitude of the resultant force acting on it? (b) If this same force is applied to a 4.0-kg object, what acceleration is produced?
Shown below is a 10.0-kg block being pushed by a horizontal force of magnitude 200.0 N.The coefficient of kinetic friction between the two surfaces is 0.50. Find the acceleration of the block.
A man exerts a horizontal force of 112 N on a refrigerator of mass 42.0 kg. If the refrigerator doesnt move, what is the minimum coefficient of static friction between the refrigerator and the floor? (See Section 4.6.)
Force FBhas twice the magnitude of force FA. Find the direction in which the particle accelerates in this figure.
While sliding a couch across a floor, Andrea and Jennifer exert forces FA and FJ on the couch. Andrea’s force is due north with a magnitude of 130.0 N and Jennifer’s force is 32 east of north with a magnitude of 180.0 N. (a) Find the net force in component form. (b) Find the magnitude and direction of the net force. (c) If Andrea and Jennifer’s housemates, David and Stephanie, disagree with the move and want to prevent its relocation, with what combined forceFDS should they push so that the couch does not move?
Describe two examples in which the force of friction exerted on an object is in the direction of motion of the object.
Newton’s Second Law Andrea, a 63.0-kg sprinter, starts a race with an acceleration of 4.200m/s2 . What is the net external force on her?
Two teenagers are pulling on ropes attached to a tree. The angle between the ropes is 30 . David pulls with a force of 400.0 N and Stephanie pulls with a force of 300.0 N. (a) Find the component form of the net force. (b) Find the magnitude of the resultant (net) force on the tree and the angle it makes with David’s rope.
A helicopter with mass 2.35104kg has a position given by r(t)=(0.020t3)i +(2.2t)j -(0.060t2)k . Find the net force on the helicopter at t=3.0s .
Draw a free-body diagram of a diver who has entered the water, moved downward, and is acted on by an upward force due to the water which balances the weight (that is, the diver is suspended).