Force and resistance in practical applications​

Which of the following is a force that opposes motion between two surfaces in contact?

• Gravitational force

• Frictional resistance

• Tractive effort

• Spring force

What is the term for the force exerted by a vehicle's engine to move it forward?

• Braking force

• Gravitational force

• Tractive effort

• Rotational kinetic energy

Which of the following is an example of energy due to an object's rotation?

• Moment of inertia

• Rotational kinetic energy

• Spring force

• Frictional resistance

What is the term for the resistance to change in rotational motion?

• Gravitational force

• Tractive effort

• Moment of inertia

• Braking force

What is the formula for calculating the force of gravity on an object?

• F = ma

• W = mg

• P = mv

• E = mc²

What is the approximate value of gravitational acceleration on Earth?

• 9.81 m/s²

• 8.91 m/s²

• 10.81 m/s²

• 7.81 m/s²

What type of force is gravity?

• Contact force

• Non-contact force

• Frictional force

• Tension force

What is the only force acting on an object in freefall?

• Friction

• Air resistance

• Gravity

• Tension

Which equation represents the vertical displacement of an object in freefall?

• h = gt

• v = gt

• h = gt²

• v² = 2gh

In the equation v = gt, what does 'v' represent?

• Initial velocity

• Final velocity

• Vertical displacement

• Time