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Q1. A ball in flight is recorded and analyzed using digital video analysis software. The analysis produced the result that the ball had a horizontal speed of 0.60 m/s. In the analysis, a stick was used as a calibration standard, and it was believed that the stick was 1.0 m long. Though, after the analysis was done, it was discovered that the stick was actually 0.90 m long.
Was the horizontal speed actually faster or slower than analysis result?
What should the result have been for horizontal speed (Vx)?
Q2. A train at rest emits a sound at a frequency of 1045 Hz. An observer in a car travels away from the sound source at a speed of 37 m/s.
What is the frequency heard by the observer? Imagine the speed of sound in air to be 340 m/s.
A rotating wheel requires 3.08-s to rotate through 37.0 revolutions. What is the constant angular acceleration of the wheel
The space shuttle is in a 400km -high circular orbit. It needs to reach a 580km -high circular orbit to catch the Hubble Space Telescope for repairs. How much energy is required to boost it to the new orbit
What is the specific heat capacity of other substance.
Three capacitors (3.81, 5.89, and 11.3 ?F) are connected in series across a 45.0 V battery. Calculate the voltage across the 3.81 F capacitor?
A hare and a tortoise compete in a race over a straight course 0.90 km long. The tortoise crawls at a speed of 0.300 m/s toward the finish line, For how long in time was the hare stationary
A 1.10 kg water balloon is shot straight up with an initial speed of 4.10 m/s. What is the kinetic energy of the balloon just as it is launched
A 0.39 kg iron horseshoe that is initially at 745°C is dropped into a bucket containing 24 kg of water at 46°C. What is the final equilibrium temperature? Neglect any heat transfer to or from the surroundings.
A person holds a rifle horizontally and fires at a target. The bullet has a muzzle speed of 200m/s, The air temp is 72 degrees Fahrenheit. What is the distance to the target
A suitcase is pulled by a tether that makes a 60 degree angle with the horizontal. what is the magnitude of the pull
Jack and John are standing 6m apart from each other playing soccer. Jack kicks the ball to John and John kicks it back immediately. find the speed of the ball when it's kicked back to Jack
A mass on a spring with constant 3.63 N/m vibrates with position given by the equation x = (5.00 cm) cos(3.10t rad/s). What is the maximum rate of energy transformation
A 60.0-g object is attached to a horizontal spring with a force constant of 15.0 N/m, What is the velocity of the object when it is halfway to the equilibrium position if the surface is frictionless
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