FORCES

Define results at force acting on an object

The overall force acting on an object, taking into account magnitude and direction

Scalar vs vector

Scalar- magnitude only

Vector- magnitude and direction

An object moves at a constant velocity. What does this tell you about the resultant force?

The resultant force is zero. The forces are balanced, so the object has no acceleration and continues at a constant velocity

2 factors that affect stopping distance

• drivers reaction time, affects thinking times which affects thinking distance

• condition of roads, which affect braking distance

Difference between mass and weight

• mass : amount of matter in an object (kg)

• Weight : force acting on an object due to gravity (N)

Describe relationship between force and extension before the limit of proportionality

• the extension of spring id directly proportional to the force applied

• If force doubles, extension doubles

• Graph of force against extension is a straight ling through the origin

Limit of proportionality

The point beyond which extension is no longer directly proportional to force