Dynamics and Motion - Calculation Questions

Convert 80 mph to ft/s.

• 87 ft/s

• 97 ft/s

• 107 ft/s

• 117 ft/s

What is the force applied if a 0.5 lb baseball is stopped in 0.2 seconds?

• 50 lbs

• 25 lbs

• 10 lbs

• 5 lbs

Fill in the blank: The negative sign in angular acceleration indicates ____.

• Deceleration

• Acceleration

• Constant speed

• Increasing speed

What should be done to convert weight (lb) to mass (slugs)?

• Divide by acceleration due to gravity

• Multiply by velocity

• Add to force

• Subtract from momentum

What is the coefficient of static friction (μs) for a 50 lb box on a horizontal surface?

• 0.4

• 0.3

• 0.5

• 0.6

What is the initial vertical velocity (Voy) of a ball thrown at 30 degrees with an initial velocity of 100 ft/s?

• 40 ft/s

• 50 ft/s

• 60 ft/s

• 80 ft/s

Calculate the maximum static friction force (Fsmax) if the normal force is 30 lb., static friction us=0.4, and the coefficient of kinetic friction is uk=0.3

• 10 lb

• 12 lb

• 20 lb

• 22 lb

Fill in the blank: The net force is the applied force minus the ________ friction force.

• static

• kinetic

• dynamic

• rolling

Fill in the blank: The normal force is equal to the ________ of the box.

• weight

• height

• width

• length

Which of the following topics is covered in dynamics calculations?

• Thermodynamics

• Projectile motion

• Quantum mechanics

• Electromagnetism