what is his net velocity? If the river is 0.5 miles wide‚ at what point will he land on the other side? Solution: The first step in problem solving is to identify the problem type. In this problem we are asked for a ‘net velocity.’ Since velocities behave as vectors‚ then we have a vector addition problem. A figure is drawn with the vectors indicated. Here vb is the boat’s velocity (still water)‚ vr is the river’s velocity‚ and vnet is the resultant (net) of these two velocities. The vector equation
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KINEMATICS IN ONE DIMENSION chapter Section 2.1 Displacement Section 2.2 Speed and Velocity 1. A particle travels along a curved path between two points P and Q as shown. The displacement of the particle does not depend on- Q (a) The location of Q. (b) The location of P. (c) The direction of Q from P. P (d) The distance traveled from P to Q. Ans. (d) 2. For which one of the following situations will the path length
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20g through 1 m/s2. · A force of 100N acts on a mass of 25 kg for 5 s .What velocity does it generate? · A bullet leaves a rifle with a velocity of 100m/s and the rifle of mass 2.5 kg recoils with a velocity of 1m/s. find the mass of the bullet? · Certain force acting on a mass of 15kg for 3s‚ gives it a velocity of 2m/s. Find the magnitude of force. · A cricket ball of mass 0.15 kg is moving with a velocity of 1.2m/s . Find the impulse on the ball and average force applied by the player
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State‚ for each of the following physical quantities‚ if it is a scalar or a vector: volume‚ mass‚ speed‚ acceleration‚ density‚ number of moles‚ velocity‚ angular frequency‚ displacement‚ angular velocity. Answer: Scalar: Volume‚ mass‚ speed‚ density‚ number of moles‚ angular frequency Vector: Acceleration‚ velocity‚ displacement‚ angular velocity A scalar quantity is specified by its magnitude only. It does not have any direction associated with it. Volume‚ mass‚ speed‚ density‚ number of
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this elevator depend on the vertical force F that acts on the elevator‚ causing it to move upwards. However in Chapter 18‚ it perform the relative motion analysis of a point on the body which states the calculation of the motion of an object with regard to some other moving object. Thus‚ the motion is not calculated with reference to the earth‚ but is the velocity of the object in reference to the other moving object as if it were in a static
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When something spins it undergoes “rotational motion”. When something spins around a single point it is called “circular motion”. B. We measure how fast something spins not in m/s (different points on the object are spinning at different velocities) but by measuring the angle described in a given time period. C. Angles can be measured in radians (rad) 1. The radian is the ratio of the arc length (s) to the radius (r) of a circle (insert fig. 7-1 here)
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in velocity as time goes by Change in velocity as time goes by Review Acceleration: Magnitude or direction (not units) Direction only Magnitude or direction (not units) Direction only Acceleration means _______________________________________________ What CAN change for a velocity vector? _____________________________________ What IS changing when something moves in a circle? ____________________________ an object in motion continues in constant-velocity motion
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(convertible to height) of 1000‚ 900‚ and 800 milliliters. Two trials were conducted for each matrix. From the data‚ it was observed that as the initial concentration of slurry is increased‚ the initial settling velocities decrease. The initial height has no effect on the initial settling velocity but can affect the rate at which solids compact. However‚ it was found that how the height affects compaction can be unpredictable. For the design of a thickener using batch sedimentation data‚ the required
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average velocity on this trip? Answer: 27 km/h 4. A bullet is fired through a board‚ 14.0 cm thick‚ with its line of motion perpendicular to the face of the board. If it enters with a speed of 450 m/s and emerges with a speed of 220 m/s‚ what is the bullet’s acceleration as it passes through the board? Answer: –550 km/s2 5. A particle confined to motion along the x axis moves with constant acceleration from x = 2.0 m to x = 8.0 m during a 2.5s time interval. The velocity of the particle
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GRAVITATION Kepler’s Laws Towards the end of the sixteenth century‚ Tycho Brahe collected a huge amount of data giving precise measurements of the position of planets. Johannes Kepler‚ after a detailed analysis of the measurements announced three laws in 1619. 1. The orbit of each planet is an ellipse which has the Sun at one of its foci. 2. Each planet moves in such a way that the (imaginary) line joining it to the Sun sweeps out equal areas in equal times. 3. The squares of the periods
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