18 Questions
What is the vertical acceleration in projectile motion?
The vertical acceleration is equal to gravitational field strength (g).
What is terminal velocity, and when is it reached?
Terminal velocity is the maximum velocity reached when the forces acting on a falling object become balanced, resulting in zero acceleration.
What is friction, and what is its direction relative to motion?
Friction is a resistance to motion between an object and a surface or an object moving through a fluid, and it acts in the opposite direction to the movement.
Which of Newton's Laws states that every action force has an equal and opposite reaction force?
Newton's third law.
What is the formula for Newton's second law, and what do the variables represent?
F = ma, where F is the force applied, m is the mass of the object, and a is the acceleration.
What is the relationship between the force applied to an object and its resulting acceleration, according to Newton's second law?
The force applied to an object is directly proportional to its resulting acceleration, as expressed by the formula F = ma.
What is the rate of change of momentum also known as?
Force
What does the area underneath a force-time graph represent?
Impulse, the change in momentum
What is the formula for impulse?
F∆t = ∆mv
What is the rate of work done equal to?
The power
What is the formula for efficiency?
Efficiency = The useful output power / input power
What is meant by the principle of conservation of energy?
Energy cannot be created or destroyed, only converted from one form to another
What is the principle of moments in an object in equilibrium?
The sum of the anticlockwise moments is equal to the sum of the clockwise moments.
What does it mean for an object to be in equilibrium?
The object is not accelerating, so it is either stationary or moving at a constant velocity.
How can you determine if the forces acting on an object are in equilibrium?
By adding the horizontal and vertical components of the forces, which should equal zero, or by drawing a scale diagram that forms a closed triangle.
What is a moment in physics?
A turning force, which is the product of the force and the perpendicular distance from the point to the line of action of the force.
What is the relationship between the clockwise and anticlockwise moments in an object in equilibrium?
The sum of the anticlockwise moments is equal to the sum of the clockwise moments.
What is the state of motion of an object in equilibrium?
The object is either stationary or moving at a constant velocity.
Test your knowledge of projectile motion with questions on vertical acceleration, terminal velocity, and more.
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