U8: Review, Inquiry, FBD Drawing, Trig

Front

What is the vertical component of tension in a pendulum?

Back

The vertical component of tension is the force acting upwards against gravity, keeping the pendulum in equilibrium. It can be calculated using trigonometric functions based on the angle of the pendulum.

Front

What is the horizontal component of tension in a pendulum if the vertical component is 20N?

Back

The horizontal component of tension can be calculated using the Pythagorean theorem if the angle is known. In this case, it is 6.89 N.

Front

What direction does tension act when pulling an object across a surface?

Back

Tension acts in the direction of the applied force, which is typically upwards and towards the direction of the pull, e.g., 'up and to the right'.

Front

How do you determine the initial horizontal speed of a projectile?

Back

The initial horizontal speed can be determined using the initial speed and the angle of projection. For a cannonball fired at 45.0 m/s, the horizontal speed is 20.4 m/s.

Front

How do you determine the initial vertical speed of a projectile?

Back

The initial vertical speed can be calculated using the initial speed and the angle of projection. For a cannonball fired at 45.0 m/s, the vertical speed is 40.1 m/s.

Front

What is the direction of friction when an object is being pulled to the right?

Back

Friction acts in the opposite direction to the motion, so if the object is pulled to the right, friction acts to the left.

Front

Define tension in physics.

Back

Tension is the force exerted by a string, rope, or cable when it is pulled tight by forces acting from opposite ends.

Front

What is the role of drag in projectile motion?

Back

Drag is a force that opposes the motion of an object through a fluid (like air). In many physics problems, drag is neglected to simplify calculations.

Front

Explain the concept of equilibrium in the context of forces.

Back

Equilibrium occurs when the net force acting on an object is zero, meaning all forces are balanced, and the object remains at rest or moves at a constant velocity.

Front

What is the significance of the angle of projection in projectile motion?

Back

The angle of projection determines the trajectory of the projectile, affecting both the horizontal and vertical components of its initial velocity.