Mechanics

Question 1

Force

Answer 1

changes state of motion of an object (N)

F=ma

Question 2

Newton

Answer 2

Give the mass of 1kg an acceleration of 1m per second per second

N=kg.m.s-1

weight force that we sense when holding a mass which is subject to acceleration by gravity
earth gravitational field accelerate at 9.81m.s-2 therefore 9.81N

Question 3

Pressure

Answer 3

Force applied over a unit area (pascals, P)

P=F/A

Question 4

Pascal

Answer 4

1Pascal is equal for force 1N over 1m2

N.m-2

Question 5

Energy

Answer 5

Capacity to do work (J, joules)

Question 6

Work

Answer 6

Result of a force acting upon an object to cause its displacement in the direction of the force applied

J=FD

Question 7

Joule

Answer 7

The work done when the force of 1N and D distance travelled in the direction of a force is 1J

J=FD

J=PV

Question 8

Power

Answer 8

rate at which work is done (watts, W)

W=J/s

Question 9

Watt

Answer 9

Power expanded when one Joule of energy is consumed in 1 sec by 1 watt