Scalar and Vector Quantities

Question 1

What is the difference between scalar and vector quantities

Answer 1

Scalar quantities have magnitude only
Vector quantities have magnitude and direction

Question 2

Define mass and weight
What is the equation linking them both

Answer 2

Mass-the physical quantity of matter the body possesses
Weight-the gravitational force exerted on an object

Weight (N)=mass(kg)xgravity(N/kg)

Question 3

Define distance and speed
What is the equation linking both

Answer 3

Distance-the path a body takes as it moves from the starting to finishing position
Speed- the body’s movement per unit of time with no reference in direction

Distance(m)=speed(m/s)xtime(s)

Question 4

Define displacement and velocity
What is the equation linking both

Answer 4

Displacement-the shortest possible distance in a straight line between the starting and finishing position

Velocity-the rate of change of displacement

Displacement(m)=velocity(m/s)xtime(s)

Question 5

Define what the following mean on a distance-time graph
1.perfectly horizontal
2.perfect diagonal
3.increasing gradient
4.decreasing gradient

Answer 5

1.Stationary
2.Constant speed
3.Acceleration
4.Deceleration

Question 6

Define what the following mean on a velocity-time graph
1.perfectly horizontal
2. increases then decreases below x-axis
3.increasing gradient
4.decreasing gradient

Answer 6

1.constant velocity
2.change in direction
3.Acceleration
4.Deceleration

Question 7

Define acceleration
What is its equation

Answer 7

Rate of change of velocity
Acceleration(m/s^2)=change in velocity(m/s)/time (s)