Kinematics Flashcards
What is thinking distance?
The distance travelled from the moment the driver sees a hazard until the brakes are applied
A ball is dropped from rest above the ground. Air resistance has negligible effect on the motion of
the ball. How can you linearize a x-v graph?
Square v.
What is stopping distance?
The thinking distance plus braking
distance.
What are factors that affect braking distance?
The speed, mass, condition of tyres, condition of brakes, condition of road, gradient of road.
What is the motion of the skydiver
immediately after jumping?
Only force is the weight thus acceleration is 9.8 ms^-2.
What is the motion of the skydiver before terminal velocity is reached?
Drag increases with speed. Total force decreases.
Acceleration is less than g.
What is the motion of the skydiver at terminal velocity?
Total force is zero. Acceleration is zero. Constant velocity.
What is braking distance?
The distance taken for the vehicle to come to rest when the brakes are applied.
What is braking time?
The time taken for the vehicle to come to rest when the brakes are applied.
What is Newton’s First Law of Motion?
An object will move at constant velocity unless acted upon by an unbalanced force.
What is Newton’s Second Law of Motion?
The total unbalanced force on an object is directly proportional to the rate of change of momentum and the
unbalanced force is in the same direction as the rate of change of momentum.
What is Newton’s Third Law of Motion?
For every force there is an equal but opposite force.
What is linear momentum?
The product of the mass and velocity of an object.
What is impulse?
The change of momentum of an object.
What is the conservation of momentum?
For an isolated system, the total linear momentum in any direction is a constant.
