Understanding Forces and Motion

Front

What is the formula for calculating work done against gravity?

Back

Work = Force x Distance (W = F x d), where Force is the weight of the object and Distance is the height climbed.

Front

If a climber weighs 660 N and climbs a 20 m cliff, how much work is done against gravity?

Back

13,200 J

Front

What is the definition of work in physics?

Back

Work is done when a force causes an object to move in the direction of the force.

Front

How do you calculate the work done by a force applied to an object moving at constant speed?

Back

Work = Force x Distance (W = F x d), where Force is the applied force and Distance is the distance moved in the direction of the force.

Front

What is the work done by a 2.0 N force moving a crate 4 m at constant speed?

Back

4 J

Front

What is the principle of conservation of momentum in collisions?

Back

The total momentum before the collision is equal to the total momentum after the collision, provided no external forces act on the system.

Front

How do you calculate the final velocity of two objects that stick together after a collision?

Back

Final velocity (v_f) = (m1*v1 + m2*v2) / (m1 + m2), where m1 and m2 are the masses and v1 and v2 are their velocities before the collision.

Front

What is the significance of the moment of inertia in rotational motion?

Back

Moment of inertia measures an object's resistance to changes in its rotational motion.

Front

What is angular velocity?

Back

Angular velocity is the rate of change of angular displacement with respect to time.

Front

What is the formula for angular velocity?

Back

Angular velocity (ω) = Angular displacement (θ) / Time (t).