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A small block is placed over another block which is moving with a velocity of 5m/s. What is the absolute velocity of the small block?
  • a)
    5m/s
  • b)
    10m/s
  • c)
    0m/s
  • d)
    14m/s
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
A small block is placed over another block which is moving with a velo...
The absolute velocity of the small block is the same as that of the block moving with 5m/s. This is because absolute velocity is studied with respect to the ground frame. The relative velocity of the small block with respect to the other block is zero.
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A small block is placed over another block which is moving with a velo...
Velocity is a vector quantity that describes the rate of change of an object's position. It has both magnitude and direction. In this scenario, we have a small block placed over another block that is already moving with a velocity of 5m/s. We are required to find the absolute velocity of the small block.

Absolute Velocity: The absolute velocity of an object is the velocity of the object with respect to a fixed reference point or frame of reference. In other words, it is the velocity of the object relative to an observer who is stationary or not moving.

To determine the absolute velocity of the small block, we need to consider the velocity of the small block with respect to the stationary observer. Since the small block is placed on top of the moving block, it will have the same velocity as the moving block.

Therefore, the absolute velocity of the small block is equal to the velocity of the moving block, which is given as 5m/s.

Hence, the correct answer is option 'A' - 5m/s.
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Directions:Read the passages and choose the best answer to each question.PassageNear the end of the 19th century, British engineer Osborne Reynolds ran a set of experiments to observe and predict the transition between laminar (steady) and turbulent flow of a liquid through a pipe. In Reynolds’ experiments, dye was forced through a liquid to show visually when the flow changed from laminar to turbulent. Laminar flow is common only in cases in which the flow channel is relatively small, the fluid is moving slowly, and its viscosity (the degree to which a fluid resists flow under an applied forc e) is relatively high. In turbulent flow, the speed of the fluid at any given point is continuously undergoing changes in both magnitude and direction. Reynolds demonstrated that the transition from laminar to turbulent flow in a pipe depends upon the value of a mathematical quantity equal to the velocity of flow (V ) times the diameter of the tube (D) times the mass density (ρ) of the fluid divided by its absolute viscosity (µ). The “Reynolds number,” as it is called, is determined by the following equation:Several students designed similar experiments to observe flow rates of different liquids. To conduct the experiments, the students were given the following apparatus: Liquid supply tank with clear test section tube and ‘bell mouth’ entrance 1 Rotameter to measure the velocity of flow (flow rate) Tap water • Motor oil 4, 10-ft long smooth pipes of various diameters: 0.25-inch, 0.50-inch, 0.75-inch, 1.0-inchFigure 1 illustrates an approximation of the set-up of each experiment.Figure 2 shows approximate viscosities of the water and motor oils used in the experiments.Experiment 1In Experiment 1, students began with a pipe of diameter 0.25 inches. The pipe was set first at a 15° angle and tap water was released steadily from the tank into the pipe. The velocity of flow (V) was measured. The pipe was then set at a 30° angle, a 45° angle, and a 60° angle, water was released steadily from the tank into the pipe, and the velocity of flow was measured. The process was then repeated for each diameter of pipe using the same amount of water each time. All data were recorded in Table 1. Temperature of the water was held constant at 20°C.Experiment 2In the second experiment, the tap water was replaced by Motor Oil A and the processes were repeated. The results are given in Table 2.Experiment 3In a third experiment, the tap water was replaced by Motor Oil B and the processes were repeated.Q.Which of the following conclusions is best supported by information in the passage? As viscosity increases

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A small block is placed over another block which is moving with a velocity of 5m/s. What is the absolute velocity of the small block?a)5m/sb)10m/sc)0m/sd)14m/sCorrect answer is option 'A'. Can you explain this answer?
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