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A stone whose mass is 0.1 kg rests on a horizontal frictionless surface. A bullet of mass 0.0025 kg, traveling horizontally at 400 m/s, strikes the stone and rebounds horizontally at right angle to its original direction with a speed of 300 m/s. Compute the magnitude and direction of the velocity of the stone after it is struck
A test driver accelerates a car uniformly at a rate of 2m/s2 starting from rest to a velocity of 24m/s. The car maintains this velocity for T seconds and then retards uniformly to a velocity of 16m/s in a further 10 seconds.
(i) sketch a velocity-time diagram of the motion of the car
Find(ii) the time elapsed during the acceleration
(iii) the distance travelled during the acceleration,
(iv) the distance travelled during 10 seconds retardation,
(v) the value of T, given that the total distance travelled by that car is 1496 meters
PARALLEL CIRCUIT
What is the equivalent resistance of this circuit? (show your complete solution)
The figure shows a circuit with three resistors. The first resistor is horizontal and labeled 150 ohms. The left end of the first resistor is connected to a second resistor of 250 ohms. The other end of the second resistor is connected to a third resistor of 50 ohms, which in turn is connected to the right end of the first resistor.
A satellite orbits the earth a distance of 1.50 × 107 m above the planet's surface and takes 8.65 hours for each revolution about the earth. The earth's radius is 6.38 × 106 m. The acceleration of this satellite is closest to
Teboho stands on the side of the freeway. Randall has just passed his traveling 44 m/s and he is traveling north. While Morena is headed towards him from the south at a speed of 60 m/s. Thabiso hoots his horn that has a frequency of about 400 Hz. If we consider the speed of sound in air as 340 m/s. Calculate the horn’s frequency that Randall is hearing.
We thought electrons acted only like particles, but what else does an electron behave like?
A fire hose ejects a stream of water at an angle of 50.0 above the horizontal. The water behaves like a projectile, what is the highest place on the building the water can reach if the truck is located 30 m away from the building
What is the equivalent resistance of this circuit? (show your complete solution)
The figure shows a circuit with three resistors. The first resistor is horizontal and labeled 150 ohms. The left end of the first resistor is connected to a second resistor of 250 ohms. The other end of the second resistor is connected to a third resistor of 50 ohms, which in turn is connected to the right end of the first resistor.
A stunt car travelling toward the edge of a cliff at 25 meters measured horizontally from the edge of the cliff.
A. How much time does it take the car to reach the ground?
B. Determine the height of the cliff.
The velocity of an object is given by the expression v(t) = 3.00 m/s + (4.00 m/s3)t2, where t is in seconds. Determine the position of the object as a function of time if it is located at x = 1.00 m at time t = 0.00 s .
