The Earth has mass 5.89 $\times$ 1024 kg. The moon has mass 7.36 $\times$ 1022 kg and is 3.84 $\times$ 105 km from Earth. How far from the center of Earth is the center of mass of the Earth-moon system?

A) 4.7 $\times$ 103 km B) 7.4 $\times$ 103 km C) 1.9 $\times$ 105 km D) 2.1 $\times$ 105 km E) 3.8 $\times$ 103 km A) 4.7 $\times$ 103 km B) 7.4 $\times$ 103 km C) 1.9 $\times$ 105 km D) 2.1 $\times$ 105 km E) 3.8 $\times$ 103 km

A mass m2 = 1.5 kg rests on a horizontal table. The coefficients of friction between m2 and the table are µs = 0.3 and µk = 0.25. The mass m2 is attached by strings to masses m1 = 2.5 kg and m3 = 4.5 kg as shown. Masses m1 and m3 hang freely. The system is initially held at rest. After it is released, the acceleration of m2 is approximately

A) 1.9 m/s2 B) 2.4 m/s2 C) 3.0 m/s2 D) zero E) 13 m/s2 A) 1.9 m/s2 B) 2.4 m/s2 C) 3.0 m/s2 D) zero E) 13 m/s2

Exam 5: Applications of Newtons Laws

A block of wood is pulled by a horizontal string across a rough surface at a constant velocity with a force of 20 N. The coefficient of kinetic friction between the surfaces is 0.3. The force of friction is

(Multiple Choice)

4.8/5

(32)

Question 61

A 100-kg block is pushed up a 30º incline that is 10 m long. If the coefficient of friction between the block and the incline is 0.1, the constant force parallel to the incline that is required to move the block from rest at the bottom of the incline to the top in 3 s is approximately

(Multiple Choice)

4.7/5

(36)

Question 62

The Earth has mass 5.89 $\times$ 10²⁴ kg. The moon has mass 7.36 $\times$ 10²² kg and is 3.84 $\times$ 10⁵ km from Earth. How far from the center of Earth is the center of mass of the Earth-moon system?

(Multiple Choice)

4.9/5

(34)

Question 63

Which fundamental force(s) gives rise to friction?

(Multiple Choice)

4.9/5

(41)

Question 64

A tired worker pushes a heavy (100-kg) crate that is resting on a thick pile carpet. The coefficients of static and kinetic friction are 0.6 and 0.4, respectively. The worker pushes with a force of 500 N. The frictional force exerted by the surface is

(Multiple Choice)

4.8/5

(29)

Question 65

A mass m₂ = 1.5 kg rests on a horizontal table. The coefficients of friction between m₂ and the table are µ_s = 0.3 and µ_k = 0.25. The mass m₂ is attached by strings to masses m₁ = 2.5 kg and m₃ = 4.5 kg as shown. Masses m₁ and m₃ hang freely. The system is initially held at rest. After it is released, the acceleration of m₂ is approximately

(Multiple Choice)

4.9/5

(30)

Question 66

The system in the figure is moving with constant speed v to the right on a stationary ramp. The system will accelerate to the right if

(Multiple Choice)

4.7/5

(35)

Question 67

The free-body diagram that best represents the forces acting on the student at rest on the incline is

(Multiple Choice)

4.9/5

(40)

Question 68

A 50-kg box is placed in the bed of a truck. The coefficient of friction between the box and the truck bed is 0.54. If the truck is traveling at 87 km/h (~54 mph) then calculate the minimum distance the truck can stop in without the box sliding into the cab.

(Multiple Choice)

5.0/5

(28)

Question 69

The figure shows a top view of a ball on the end of a string traveling counterclockwise in a circular path. The speed of the ball is constant. If the string should break at the instant shown, the path that the ball would follow is

(Multiple Choice)

4.7/5

(47)

Question 70

A horizontal force acts on a mass m that lies on a horizontal surface. The acceleration of m is . The coefficient of kinetic friction µ_k between mass m and the surface can be calculated from

(Multiple Choice)

4.9/5

(39)

Question 71

An Atomic Force Microscope consists of a cantilever with a very fine tip on one end. The lever is driven by a piezoelectric motor allowing the tip to scan a surface on an atomic scale. As it scans the surface what is the main frictional force between the tip and the surface?

(Multiple Choice)

4.9/5

(29)

Question 72

A 6000-kg truck is accelerating at 0.5 m/s² up a slope of 5 degrees. If the opposing forces due to road friction and air resistance are 80 N per 1000 kg of truck mass, calculate the driving force needed for the truck to accelerate up the incline.

(Multiple Choice)

5.0/5

(30)

Question 73

A block of mass m_b rests on a horizontal surface and is accelerated by means of a horizontal cord that passes over a frictionless peg to a hanging weight of mass m_w. The coefficient of kinetic friction between the block and the horizontal surface is µ and the tension in the cord is T. The acceleration of the block is given by

(Multiple Choice)

4.8/5

(41)

Question 74

When you accelerate your car, the front of the car lifts up slightly. Or when you brake, the front dips down. The primary reason is because the

(Multiple Choice)

4.7/5

(42)

Question 75

Showing 61 - 75 of 75

A block of wood is pulled by a horizontal string across a rough surface at a constant velocity with a force of 20 N. The coefficient of kinetic friction between the surfaces is 0.3. The force of friction is

A 100-kg block is pushed up a 30º incline that is 10 m long. If the coefficient of friction between the block and the incline is 0.1, the constant force parallel to the incline that is required to move the block from rest at the bottom of the incline to the top in 3 s is approximately

The Earth has mass 5.89 $\times$ 10²⁴ kg. The moon has mass 7.36 $\times$ 10²² kg and is 3.84 $\times$ 10⁵ km from Earth. How far from the center of Earth is the center of mass of the Earth-moon system?

Which fundamental force(s) gives rise to friction?

A tired worker pushes a heavy (100-kg) crate that is resting on a thick pile carpet. The coefficients of static and kinetic friction are 0.6 and 0.4, respectively. The worker pushes with a force of 500 N. The frictional force exerted by the surface is

The system in the figure is moving with constant speed v to the right on a stationary ramp. The system will accelerate to the right if

The free-body diagram that best represents the forces acting on the student at rest on the incline is

A 50-kg box is placed in the bed of a truck. The coefficient of friction between the box and the truck bed is 0.54. If the truck is traveling at 87 km/h (~54 mph) then calculate the minimum distance the truck can stop in without the box sliding into the cab.

The figure shows a top view of a ball on the end of a string traveling counterclockwise in a circular path. The speed of the ball is constant. If the string should break at the instant shown, the path that the ball would follow is

A horizontal force acts on a mass m that lies on a horizontal surface. The acceleration of m is . The coefficient of kinetic friction µ_k between mass m and the surface can be calculated from

An Atomic Force Microscope consists of a cantilever with a very fine tip on one end. The lever is driven by a piezoelectric motor allowing the tip to scan a surface on an atomic scale. As it scans the surface what is the main frictional force between the tip and the surface?

A 6000-kg truck is accelerating at 0.5 m/s² up a slope of 5 degrees. If the opposing forces due to road friction and air resistance are 80 N per 1000 kg of truck mass, calculate the driving force needed for the truck to accelerate up the incline.

When you accelerate your car, the front of the car lifts up slightly. Or when you brake, the front dips down. The primary reason is because the

Systems of Measurement

Motion in One Dimension

Motion in Two and Three Dimensions

Newtons Laws

Work and Energy

Conservation of Energy

Systems of Particles and Conservation of Linear Momentum

Rotation

Conservation of Angular Momentum

Gravity

Static Equilibrium and Elasticity

Fluids

Oscillations

Wave Motion

Superposition and Standing Waves

Temperature and the Kinetic Theory of Gases

Heat and the First Law of Thermodynamics

The Second Law of Thermodynamics

Thermal Properties and Processes

Filters

Exam 5: Applications of Newtons Laws

A block of wood is pulled by a horizontal string across a rough surface at a constant velocity with a force of 20 N. The coefficient of kinetic friction between the surfaces is 0.3. The force of friction is

A 100-kg block is pushed up a 30º incline that is 10 m long. If the coefficient of friction between the block and the incline is 0.1, the constant force parallel to the incline that is required to move the block from rest at the bottom of the incline to the top in 3 s is approximately

The Earth has mass 5.89 ×\times× 1024 kg. The moon has mass 7.36 ×\times× 1022 kg and is 3.84 ×\times× 105 km from Earth. How far from the center of Earth is the center of mass of the Earth-moon system?

Which fundamental force(s) gives rise to friction?

A tired worker pushes a heavy (100-kg) crate that is resting on a thick pile carpet. The coefficients of static and kinetic friction are 0.6 and 0.4, respectively. The worker pushes with a force of 500 N. The frictional force exerted by the surface is

The system in the figure is moving with constant speed v to the right on a stationary ramp. The system will accelerate to the right if

The free-body diagram that best represents the forces acting on the student at rest on the incline is

A 50-kg box is placed in the bed of a truck. The coefficient of friction between the box and the truck bed is 0.54. If the truck is traveling at 87 km/h (~54 mph) then calculate the minimum distance the truck can stop in without the box sliding into the cab.

The figure shows a top view of a ball on the end of a string traveling counterclockwise in a circular path. The speed of the ball is constant. If the string should break at the instant shown, the path that the ball would follow is

A horizontal force acts on a mass m that lies on a horizontal surface. The acceleration of m is . The coefficient of kinetic friction µk between mass m and the surface can be calculated from

An Atomic Force Microscope consists of a cantilever with a very fine tip on one end. The lever is driven by a piezoelectric motor allowing the tip to scan a surface on an atomic scale. As it scans the surface what is the main frictional force between the tip and the surface?

A 6000-kg truck is accelerating at 0.5 m/s2 up a slope of 5 degrees. If the opposing forces due to road friction and air resistance are 80 N per 1000 kg of truck mass, calculate the driving force needed for the truck to accelerate up the incline.

When you accelerate your car, the front of the car lifts up slightly. Or when you brake, the front dips down. The primary reason is because the

Systems of Measurement

Motion in One Dimension

Motion in Two and Three Dimensions

Newtons Laws

Work and Energy

Conservation of Energy

Systems of Particles and Conservation of Linear Momentum

Rotation

Conservation of Angular Momentum

Gravity

Static Equilibrium and Elasticity

Fluids

Oscillations

Wave Motion

Superposition and Standing Waves

Temperature and the Kinetic Theory of Gases

Heat and the First Law of Thermodynamics

The Second Law of Thermodynamics

Thermal Properties and Processes

Filters

The Earth has mass 5.89 $\times$ 10²⁴ kg. The moon has mass 7.36 $\times$ 10²² kg and is 3.84 $\times$ 10⁵ km from Earth. How far from the center of Earth is the center of mass of the Earth-moon system?

A horizontal force acts on a mass m that lies on a horizontal surface. The acceleration of m is . The coefficient of kinetic friction µ_k between mass m and the surface can be calculated from

A 6000-kg truck is accelerating at 0.5 m/s² up a slope of 5 degrees. If the opposing forces due to road friction and air resistance are 80 N per 1000 kg of truck mass, calculate the driving force needed for the truck to accelerate up the incline.