P2.2 Flashcards

What is the SI unit of force?

In what direction does the force of weight always act?

What is the unit of resultant force?

What is the resultant force of a 4N force and a 3N force acting in the same direction?

What happens to the acceleration of an object as the resultant force on it decreases?

What is the resultant force on a car of mass 1000kg if its acceleration is 2m/s2?

What is the resultant force on a car travelling at a steady speed on a straight horizontal road?

What is the relationship between stopping distance, thinking distance and braking distance?

Why does an object dropped in a fluid initially accelerate?

What eventually happens to an object falling in a fluid?

What is an inelastic object?

A spring has a spring constant of 30 N/m. If the extension is 0.30m, what is the force applied?

How can we tell when a spring has exceeded its limit of proportionality?

Why does making a vehicle more streamlined improve fuel economy?

When a vehicle is travelling along a straight road at a steady speed what can you say about the engine force and the air resistance?

If you push on a wall with a horizontal force of 15N to the right, what force will the wall exert on you?

What happens to an object moving at a steady speed if the resultant force on it is zero?

When will a resultant force cause a deceleration?

What happens to the acceleration of an object as the resultant force on it increases?

What is the resultant force on a car of mass 1500 kg if its acceleration is 0.5m/s2?

What is the acceleration of a car of mass 2000kg if the resultant force acting in its direction of motion is 800N?

What is the effect of the speed of a vehicle on its stopping distance?

What is terminal velocity?

What is the weight of a person of mass 70kg?

What is an elastic object?

What does Hooke's law state?

When a force of 10N is applied to a string it extends by 2.0cm. What is the spring constant of the spring?