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Q1. Two ants race across a table 62 cm long. One travels at 4.77 cm/s and the other at 2 cm/s. When the first one crosses the finish line, how far behind is second one. What am I trying to solve for distance, speed, or time?
Q2. An airplane is flying with a velocity of 242 m/s at an angle of 30.0° with the horizontal, as the drawing shows. When an altitude of the plane is 2.50 km, a flare is released from the plane. The flare hits the target on ground. What is the angle θ?
Q3. A football is kicked at ground level with a speed of 10 m/s at an angle of 31.0° to the horizontal. How much later does it hit the ground?
A 14 g bullet travelling at 247 m/s is fired into a 0.459 kg wooden block anchored to a 100 N/m spring. How far is a spring compressed to the nearest thousandth of meter.
As part of a safety investigation, two 1400 cars travelling at 18 are crashed into different barriers. Find out the average forces exerted on (a) car that hits a line of water barrels and takes 1.8 to stop, and (b) car that hits a concrete barrier an..
Write down an expression for the mass of the nucleus
A toy of mass 0.155 kg is undergoing SHM on the end of a horizontal spring with forces constant 305 N/m. When object is a distance 1.20×10-2 m from its equilibrium position, it is observed to have the speed of 0.255 m/s.
Find out the coefficient of sliding friction
A cat runs along a straight line (the x-axis) from point A to point B to point C. The distance between points A and C is 5.00 m, distance between points B and C is 10.0 m, and the positive direction of x axis points to the right. The time to run f..
The spring is kept from pushing them apart, since they are holding each other. When they release their arms, Al moves off in one direction at a speed of 1.16m/s, while Jo moves off in the opposite direction at a speed of 0.973m/s. Assume that frictio..
A jeweller working with a heated 44 g gold ring must lower the ring's temperature to make it safe to handle. If the ring is initially at 94 degrees Celsius, what mass of water at 25 degrees Celsius is necessary to lower the ring's temperature to 35 d..
Suppose a ping-pong ball and a bowling ball are rolling toward you with the same momentum, and you exert the same average force in stopping each of them.
Find out the speed of the satellite
A space station, in the form of a wheel 133 m in diameter, rotates to provide an "artificial gravity" of 2.20 m/s2 for persons who walk around on the inner wall of the outer rim. Find the rate of the wheel's rotation in revolutions per minute that wi..
What is tension in the wire
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