Physics - Mechanics

?
  • Created by: Aneesii
  • Created on: 07-04-13 15:46
Define a vector quantity.
A quantity with magnitude & direction.
1 of 10
Describe the energy conversion that takes place when water travels from the end of a hose pipe to the ground.
The energy is converted from gravitational potential energy to kinetic energy. Kinetic energy will be at a max. at the bottom. Gravitational potential energy is 0 at the bottom and at a max. at the top. GPE lost = KE gained.
2 of 10
Define a Newton.
1N = 1kgm/s^2 OR 1N is the force needed to give a mass of 1kg an acceleration of 1m/s^2 in the direction of the force.
3 of 10
Define the centre gravity.
The point on a mass where it's all it's weight appears to act.
4 of 10
Gravity? o.o
The vertical downwards force acting on a mass.
5 of 10
Which has a greater gravitational field strength the moon or the earth?
The earth because on earth g = 9.81m/s^2, where as on the moon g =1.6m/s^2.
6 of 10
State why the equation 'F=ma' can't be applied to particles travelling at speeds close to the speed of light.
The mass of the particles increases as they get closer to the speed of light.
7 of 10
Define torque of a couple.
one of the forces x the perpendicular distance between the forces.
8 of 10
Explain why the moment of a force and the torque of a couple have the same unit Nm.
Torque and moment are to do with ‘distance multiplied by force.’
9 of 10
Define the stopping distance of a car.
stopping distance = thinking distance + braking distance
10 of 10

Other cards in this set

Card 2

Front

Describe the energy conversion that takes place when water travels from the end of a hose pipe to the ground.

Back

The energy is converted from gravitational potential energy to kinetic energy. Kinetic energy will be at a max. at the bottom. Gravitational potential energy is 0 at the bottom and at a max. at the top. GPE lost = KE gained.

Card 3

Front

Define a Newton.

Back

Preview of the front of card 3

Card 4

Front

Define the centre gravity.

Back

Preview of the front of card 4

Card 5

Front

Gravity? o.o

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Physics resources:

See all Physics resources »See all Motion resources »