Understanding Speed and Work

What is the formula to calculate speed?

• Speed = Distance + Time

• Speed = Time / Distance

• Speed = Distance - Time

• Speed = Distance / Time

Sam and Josiah went on a road trip and traveled 150 km in 3 hours. What was their average speed?

• 75 km/h

• 50 km/h

• 30 km/h

• 100 km/h

How does distance affect the time taken to travel at a constant speed?

• Travel time decreases with increased distance at constant speed.

• Distance has no effect on travel time at constant speed.

• Distance only affects travel time if speed changes.

• Distance directly affects the time taken to travel at a constant speed; more distance means more time.

What is the relationship between speed, distance, and time?

• Speed = Distance / Time

• Time = Speed - Distance

• Speed = Time / Distance

• Distance = Speed + Time

Define work in the context of physics.

• Work is the product of force and distance moved in the direction of the force.

• Work is the energy stored in an object.

• Work is the rate at which energy is transferred.

• Work is the total mass of an object multiplied by its velocity.

Darshan is pushing a heavy box across the floor. He applies a force to move it a certain distance. What is the formula for calculating the work done by Darshan?

• Work = Distance x Time

• Work = Force / Distance

• Work = Force x Distance x cos(θ)

• Work = Force + Distance

If Benil pushes a box with a force of 10 N and moves it 5 m, how much work is done?

• 50 J

• 40 J

• 25 J

• 75 J

While helping his friend AKASH move furniture, SINGH lifted a heavy box and carried it across the room. What are the SI units for measuring the work he did?

• watt (W)

• newton (N)

• pascal (Pa)

• joule (J)

While racing his bicycle, Sam wants to know how fast he is going. How is speed measured in the metric system?

• Speed is measured in miles per hour (mph) in the metric system.

• Speed is measured in feet per second (ft/s) in the metric system.

• Speed is measured in kilometers per hour (km/h) in the metric system.

• Speed is measured in meters per second (m/s) in the metric system.

In a school project, PRINCE and BENIL are tasked with creating a presentation. PRINCE believes that finishing quickly is the key to success, while BENIL thinks that taking time to ensure accuracy is more important. What is the relationship between speed and efficiency in their work?

• Speed has no impact on efficiency.

• Efficiency is always more important than speed.

• High speed guarantees high efficiency.

• Speed and efficiency are interconnected; high speed can reduce efficiency if it leads to errors, while efficiency may require more time.