## While traveling in a train at half the speed of light, you notice time slowing and distances shrinking outside. Your friend on the platform notices your

While traveling in a train at half the speed of light, you notice time slowing and distances shrinking outside. Your friend on the platform notices your clock ticking slower and the train appearing shorter. Both perspectives, based on relativity, reveal the dramatic effects of traveling at such high speeds, demonstrating time dilation and length contraction, […]

## The viscosity of a fluid is to be measured by a viscometer constructed of two 5 ft-long concentric cylinders. The inner diameter of the outer cylinder is 6

The viscosity of a fluid is to be measured by a viscometer constructed of two 5 ft-long concentric cylinders. The inner diameter of the outer cylinder is 6 inches. The gap between the two cylinders is 0.035 inch. and the gap is filled with fluid. The outer cylinder rotates at 250 rpm, and the torque is measured […]

## Object – Mass (kg) Time To Max Speed (s) 50 kg 10s 100

Object – Mass (kg) Time To Max Speed (s) 50 kg 10s 100 […]

## Simulation: Energy Skate Park Basics https://phet.colorado.edu/sims/html/energy-skate-park-basics/latest/energy-skate-park-basics_en.html Select

Simulation: Energy Skate Park Basics Select Intro. Click on (Half pipe skateboard ramp) Select (Bar Graph), (Grid), (Speed), and select the smallest mass= 80 kg) Skater is at the top of the half pipe skateboard ramp. Drag the skater to the top of the track and start the animation Select (Slow Motion) then […]

## A 25 kg box is at rest on top of a spring with spring constant k = 1000 N/m. The spring is attached to the bottom of an elevator car, as shown in the figure

A 25 kg box is at rest on top of a spring with spring constant k = 1000 N/m. The spring is attached to the bottom of an elevator car, as shown in the figure below. i) With the elevator car at rest, fi

## Calculate the magnitude of the resultant of all forces acting on the object

Calculate the magnitude of the resultant of all forces acting on the object