Mechanics

What is a force in the context of a car accident?

• A. A push or pull that causes the car to stop suddenly

• B. Something that makes the car fly in the air

• C. A type of energy that powers the car

• D. A type of wave that moves the car forward

Which unit is used to measure forces?

• A. Watts

• B. Joules

• C. Newtons

• D. Volts

What is the formula to calculate pressure in a hydraulic system?

• B. Pressure = Force - Area

• D. Pressure = Area / Force

• A. Pressure = Force x Area

• C. Pressure = Force / Area

How is speed calculated in a race?

• A. Speed = Time x Distance

• C. Speed = Distance / Time

• D. Speed = Time / Distance

• B. Speed = Distance + Time

What does a horizontal line on a distance-time graph indicate?

• The car is moving at a constant speed

• The train is decelerating

• The bicycle is stationary

• The plane is accelerating

Which force pulls objects towards the Earth?

• B. Magnetism

• D. Tension

• A. Friction

• C. Gravity

Why do sharp knives cut better than dull ones?

• D. Due to decreased friction

• A. Due to increased friction

• C. Due to increased pressure

• B. Due to decreased pressure

How does knowing the speed of a car help us in everyday life?

• C. It helps us calculate time

• D. It helps us plan and manage activities

• B. It helps us calculate distance

• A. It helps us calculate pressure

What factors can affect the speed of a moving car?

• D. Various factors such as friction, air resistance, and incline

• A. Only the car's weight

• B. Only the car's color

• C. Only the car's shape

How can you tell if a car is accelerating or decelerating from a speed-time graph?

• D. By the width of the graph

• B. By the length of the graph

• A. By the slope of the graph

• C. By the color of the graph