Physics Mechanics Quiz

The ratio of the total displacement to the total time interval.

The ratio of the total path length (distance traveled) to the total time interval.

Motion where an object covers equal distances in equal intervals of time.

The velocity of an object at a specific instant in time.

The time it takes for a projectile to travel from its launch point to the point where it hits the ground.

The horizontal distance traveled by a projectile during its flight.

The maximum vertical distance a projectile reaches during its flight.

The horizontal distance traveled by a projectile is the same when launched at angles θ and (90-θ).

The formula to calculate the time of flight of a projectile.

The formula to calculate the horizontal range of a projectile.

The formula to calculate the maximum height of a projectile.

The maximum horizontal range is achieved when the launch angle is 45 degrees.

The change in momentum of an object caused by a force acting on it over a period of time.

For every action, there is an equal and opposite reaction.

The normal force exerted by a surface on an object in contact with it.

The weight of a body appears to be different when the lift is accelerating, either upwards or downwards.

The force on body A by body B is equal and opposite to the force on body B by body A.

Vector addition is commutative, meaning the order in which you add vectors doesn't affect the result. It's like saying 2 + 3 is the same as 3 + 2.

Vector addition also follows the associative law, meaning you can group vectors in any order when adding them. It's like saying (2 + 3) + 4 is the same as 2 + (3 + 4).

Subtracting vectors is the same as adding the negative of the second vector. It's like saying A - B is the same as A + (-B).

A vector can be represented by a diagonal line in a parallelogram where the adjacent sides represent the vectors to be added. This diagonal line represents their resultant, both in magnitude and direction.

A vector with a magnitude of 1, used to indicate direction. Unit vectors have no units or dimensions.

Any vector can be expressed as the product of its magnitude and the unit vector pointing in its direction. Think of a vector's magnitude as its 'strength' and the unit vector as its 'direction'.

Breaking down a vector into its component vectors along orthogonal unit vectors (usually î, ĵ, and k̂ for the x, y, and z axes).

A method to add vectors analytically, using their components and the angle between them. This involves resolving the vectors into their components and then using trigonometry to find the magnitude and direction of the resultant.

The measure of an object's tendency to rotate, calculated as the product of its moment of inertia and its angular velocity.

A force that causes an object to rotate around an axis.

The rate of change of angular momentum over time.

The mathematical relationship between the time rate of change of angular momentum and the torque acting on an object.

The rotational analogue (equivalent) of Newton's second law, relating torque to the rate of change of angular momentum.

The vector product of the object's position vector (r) and its linear momentum (p).

The component of the linear momentum that is perpendicular to the position vector.

The angle between the position vector and the linear momentum vector.

The rate of change of angular momentum with respect to time. It is a vector quantity and its direction is perpendicular to both the force and the position vector.

The product of the moment of inertia and the angular velocity of a system of particles. It is a vector quantity and its direction is along the axis of rotation.

The angular momentum of a system remains constant if the net external torque acting on the system is zero. In simple terms, if no external forces are trying to rotate the system, its rotation will stay the same.

A rigid body is in mechanical equilibrium if it is in both translational and rotational equilibrium. This means the linear and angular momentum of the body are constant over time.

A rigid body is in translational equilibrium when the net external force acting on it is zero. This means the linear velocity of the body is constant over time, regardless of the body's rotation.

A rigid body is in rotational equilibrium when the net external torque acting on it is zero. This means the angular velocity of the body is constant over time, regardless of the body's linear motion.

A body can be in either translational or rotational equilibrium, but not both. For instance, a spinning object can have zero net force acting on it, but still be rotating.

The product of the force and the perpendicular distance from the axis of rotation to the line of action of the force. It's a vector quantity, and its direction is given by the right-hand rule.