Physics Concepts and Calculations

Front

An elevator moves upward at a constant speed of 2 m/s.

Back

Net force = 0 N (forces are balanced)

Front

A 75 kg hockey player slides on frictionless ice. If pushed with 150 N of force.

Back

Front

A rocket moves from point A to B with an initial velocity of 10 m/s. After receiving a 5 m/s perpendicular thrust.

Back

Front

Time for an object to fall from 200 m height.

Back

Front

Horizontal distance traveled by a ball thrown at 15 m/s from 20 m height.

Back

Front

Average speed of a car traveling 120 km in 2 hours.

Back

60 \text{ km/hr}

Front

Vertical velocity of a projectile at the highest point of its trajectory.

Back

Vertical velocity is zero.

Front

An object moves in a circular path with a radius of 5 m at 2 m/s. Its centripetal acceleration is:

Back

Front

A 50 kg box is pushed across a horizontal surface with a coefficient of static friction of 0.4. The maximum static friction force is:

Back

196 N *Calculation: F_{friction} = \mu \times m \times g = 0.4 \times 50 \times 9.8 = 196 N*

Front

A 0.5 kg object moves in a circular path with a radius of 2 m at a speed of 4 m/s. The centripetal force is:

Back

4 N