What's the difference between speed and velocity and what unit are they both measured in?
Velocity includes the direction traveled. m/s
1 of 11
On a velocity/time graph, what does the gradient mean and how could you work out the distance traveled?
Acceleration. By calculating the area underneath the specific point on the graph.
2 of 11
Define 'mass' and 'weigh' and their units.
Mass- amount of 'stuff in an object - never changes - kg. Weight- caused by gravitational pull - changes - N
3 of 11
What is resultant force. What would a car travelling at a steady speed's resulatant force be?
Overall force on an object. 0.
4 of 11
If a van and a car were accelerating at the same speed with equal engines what would affect their resultant forces?
Drag from airo dynamety and mass.
5 of 11
Describe how a falling object would reach terminal velocity,
At first gravity would be stronger than friction so the object would accelerate. This produces more friction until the the forces are equalled and the object would fall at a steady speed called terminal velocity.
6 of 11
What is stopping distance? And what effects this.
Thinking distance+braking distance. thinking- speed, concentration. braking- speed, brake quality, tyre quality, quality of grip
7 of 11
What's the formula for kinetic energy?
0.5*mass*speed2
8 of 11
Describe how an object reaches its elastic limit and how it changes its properties.
An elastic object can regain its shape after been stretched. However once its gone past its elastic limit the material can never regain its original shape.
9 of 11
What's the main rule about momentum?
Momentum before= (negative value of) momentum after
10 of 11
What is regenerative braking and what things to cars have to keep the passengers safe?
Converting the kinetic energy into electrical energy by reversing the vehicles motors to slow the wheels. Crumple zones, side impact bars and seat belts.
11 of 11
Other cards in this set
Card 2
Front
On a velocity/time graph, what does the gradient mean and how could you work out the distance traveled?
Back
Acceleration. By calculating the area underneath the specific point on the graph.
Card 3
Front
Define 'mass' and 'weigh' and their units.
Back
Card 4
Front
What is resultant force. What would a car travelling at a steady speed's resulatant force be?
Back
Card 5
Front
If a van and a car were accelerating at the same speed with equal engines what would affect their resultant forces?
Comments
No comments have yet been made