Kinematics
Two objects of the same shape, but different masses, are dropped from the top of the roof. Ignoring air resistance, describe the timings at which they hit the ground.
They will hit the ground at the same time
What does the word Centripetal Mean?
Towards the centre of the circle.
What is the conservation of energy?
Energy cannot be created or destroyed, only transformed or transferred.
When is total momentum conserved?
When there are no external forces
What are the two possible directions when it comes to torque?
Clockwise and Anticlockwise (counterclockwise)
When working with projectiles, the projectile velocity needs to be broken up into what two vectors?
Horizontal and Vertical Velocity
Why can an object be accelerating even though the speed it's travelling at remains the same?
The velocity can change direction
What is required to transform energy?
A force
What are the two types of collisions?
Elastic collisions and inelastic collisions
What are the requirements for equilibrium?
No net forces and no net torques.
Which kinematic equation can only be used for the horizontal component of a projectile question?
v=(Deltad)/(Deltat)
When a car is rounding a corner in a circular racetrack, what force is responsible for accelerating the car centripetally?
Friction
Which type of energy is closely linked to Hooke's Law?
Elastic Potential Energy
Which of Newton's Laws of motion explains why total momentum is conserved in collisions with no external forces?
Third Law of Motion
A torque is only present when what two components are perpendicular?
Force and Displacement from pivot
A boat accelerates from rest at a rate of 4.5ms-2 for 5s. How far did they travel in this time?
56.25m
At the Olympics, a javelin is thrown at 30ms-1 at an angle of 40o to the ground. How far does it travel?
90.4m