Exam 2: Force

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A rock of weight 17.5 N is immersed in a beaker of water while suspended from a spring scale with a reading of 9.00 N.The weight of the beaker and water together is 23.5 N.What is the net force of the beaker on the table?

(Multiple Choice)

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Question 81

A box sits on a countertop,stationary.A boy pushes horizontally to the right on the box,and a girl pushes on it to the left,yet it remains stationary.Which of the following statements is false?

(Multiple Choice)

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Question 82

The force that causes an object to fall to earth is

(Multiple Choice)

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Question 83

The fundamental force that has the shortest range is

(Multiple Choice)

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Question 84

The y-component of a force vector is -15.0N,while its magnitude is 27.2N.Which could be the vector's direction?

(Multiple Choice)

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Question 85

Using an angle of $~30^{\circ}$ to supply the force required to slide a box along a floor with a coefficient of friction of 0.30,which would require the least force to move it?

(Multiple Choice)

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Question 86

A box that weighs 300 N is pulled across a level surface with a constant velocity.The rope makes an angle of 30.0 degree above the horizontal and the tension in the rope is 100 N.What is the normal force of the floor on the box?

(Multiple Choice)

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Question 87

The fundamental force that binds the electrons to the nuclei to form atoms is

(Multiple Choice)

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Question 88

A large massive rock is in contact with the earth.Draw a force diagram for the rock and the earth.Which of the following statements is true?

(Multiple Choice)

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Question 89

A box weighing 550N slides at constant speed across a flat parking lot,under the influence of a stiff wind.The wind applies a force of 155N parallel to the surface of the parking lot.What is the angle relative to the vertical of the contact force applied by the ground.

(Multiple Choice)

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Question 90

A block is at rest on a wooden ramp.The coefficient of static friction between the block and ramp is 0.35.What is the angle between the ramp and the horizontal direction when the box first begins to slide?

(Multiple Choice)

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Question 91

In order to slide a 753 N box across the floor at a constant speed,you must push horizontally with a force of 452 N.What is the coefficient of kinetic friction?

(Multiple Choice)

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Question 92

Vector A has a magnitude of 3.0 units and makes an angle of $-90.0^{\circ}$ with the positive x-axis.Vector B has a magnitude of 4.0 units and makes an angle of $-120^{\circ}$ with the positive x-axis.What is the direction of the vector sum of A + B referenced to the positive x-axis?

(Multiple Choice)

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Question 93

Showing 81 - 93 of 93

A rock of weight 17.5 N is immersed in a beaker of water while suspended from a spring scale with a reading of 9.00 N.The weight of the beaker and water together is 23.5 N.What is the net force of the beaker on the table?

A box sits on a countertop,stationary.A boy pushes horizontally to the right on the box,and a girl pushes on it to the left,yet it remains stationary.Which of the following statements is false?

The force that causes an object to fall to earth is

The fundamental force that has the shortest range is

The y-component of a force vector is -15.0N,while its magnitude is 27.2N.Which could be the vector's direction?

Using an angle of 30∘~30^{\circ} 30∘ to supply the force required to slide a box along a floor with a coefficient of friction of 0.30,which would require the least force to move it?

A box that weighs 300 N is pulled across a level surface with a constant velocity.The rope makes an angle of 30.0 degree above the horizontal and the tension in the rope is 100 N.What is the normal force of the floor on the box?

The fundamental force that binds the electrons to the nuclei to form atoms is

A large massive rock is in contact with the earth.Draw a force diagram for the rock and the earth.Which of the following statements is true?

A box weighing 550N slides at constant speed across a flat parking lot,under the influence of a stiff wind.The wind applies a force of 155N parallel to the surface of the parking lot.What is the angle relative to the vertical of the contact force applied by the ground.

A block is at rest on a wooden ramp.The coefficient of static friction between the block and ramp is 0.35.What is the angle between the ramp and the horizontal direction when the box first begins to slide?

In order to slide a 753 N box across the floor at a constant speed,you must push horizontally with a force of 452 N.What is the coefficient of kinetic friction?

Introduction

Acceleration and Newtons Second Law of Motion

Motion With Constant Acceleration

Circular Motion

Conservation of Energy

Linear Momentum

Torque and Angular Momentum

Fluids

Elasticity and Oscillations

Waves

Sound

Temperature and the Ideal Gas

Heat

Thermodynamics

Electric Forces and Fields

Electric Potential

Electric Current and Circuits

Magnetic Forces and Fields

Electromagnetic Induction

Alternating Current

Electromagnetic Waves

Reflection and Refraction of Light

Optical Instruments

Interference and Diffraction

Relativity

Early Quantum Physics and the Photon

Quantum Physics

Nuclear Physics

Particle Physics

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Using an angle of $~30^{\circ}$ to supply the force required to slide a box along a floor with a coefficient of friction of 0.30,which would require the least force to move it?