Ball #1 (mass m) rolls off a table of height h and ball #2 (mass 2 m) rolls off a table of height 3 h. The balls have the same initial speed and hit the floor at horizontal distances x1 and x2 from the base of the table, respectively. Which statement is true? a)x2 =9×1 b)x2=x1 c)x2=√ 3×1 […]
A bumper car with a mass of 225kg moves with a velocity of 2.8m/s towards a second 227kg car sitting at rest. After an elastic collision, the first car moves off in a direction at an angle 42degrees from its original direction. The second car moves off in a direction perpendicular to the first. Find […]
Lab Objectives: Learn about conservation of energy with a skater dude! Build tracks, ramps and jumps for the skater. view the kinetic energy, potential energy and thermal energy (due to friction) as the scatter moves. Experience the differences in kinetic potential and thermal energies at different planets or even at space. Introduction: The law […]
ACTIVITY 1: Finding the density of a fluid Reset everything in the Buoyancy simulation and make sure everything is unchecked under “Show Forces” and “Readouts”. Your simulation window should look like the one below. ACTIVITY 2: Explore how the pressure in a fluid changes with height. Start the “Fluid Pressure and Flow” simulation and turn […]
ACTIVITY 1 Start the simulation and click Pause. Check the buttons for “Potential Energy Reference” and “Grid.” Click and drag the blue dot at the bottom of the track until it reaches the ground (reference line) as shown below. Click and drag to place the skater (mass 75 kg) on the track at the 6 […]
This is the case of oblique elastic collision. Let the first ball have velocity initial velocity before the collision = u and final velocity after the collision = v at 30.9° above the horizontal and the second ball have velocity w after the collision at an angle θ below the horizontal. By the law of […]
Currents of 3.0 A are placed at each of four corners of a square 12 cm on a side. The two currents on top are going into the page as viewed end on, and the two on the bottom are coming out of the page. What is the magnitude and direction of the magnetic field […]
The velocity of a vertical oscillating mass-spring system is given by: v = 0.750 m/s sin 4t Determine a) the amplitude b) maximum acceleration of this oscillator.
Two small identical spheres, A and B, are suspended on long silk threads. The spheres carry charges of +3 × 10^-6 C and -2 × 10^-6 C respectively. 4.1 Which sphere has an excess of electrons? 4.2 The two spheres are allowed to touch. Will the electrons be transferred from A to B or B […]
Two huskies are hitched to a sled that they then pull through the snow. Neither husky pulls directly forwards- they both pull at a slight angle of 10 degrees either side of directly forwards. Each husky pulls with a force of 600N. Determine the magnitude of the force.
