that the x-component of its velocity has the constant value vx = C; that is‚ x = Ct i. On the diagram above‚ indicate the directions of the particle’s velocity vector v and acceleration vector a at point R‚ and label each vector. ii. Determine the y-component of the particle’s velocity as a function of x. iii. Determine the y-component of the particle’s acceleration. b. Suppose‚ instead‚ that the particle moves along the same parabola with a velocity whose x-component is given
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length in 10 seconds. Calculate a) speed‚ b) velocity. 5. A car travels 10 m in 5 seconds‚ 20 m in next 10 seconds and 30 m in the last 10 seconds. Find the average speed of the car. 6. A body moving in a circle of radius r covers 3/4th of the circle. Calculate the ratio of distance to displacement. 7. A train is moving with a velocity of 36 km/h. Find the distance travelled by the train in a) 1 hour‚ b) 1 minute. 8. An electron moving with a velocity of 5×104 ms-1 enters into a uniform electric
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Question What would the participant’s acceleration be if he/she sprints forward in a positive direction? Hypothesis/Prediction When a person sprints forward‚ it means he/she speeds up. Consequently‚ the acceleration should be positive. When the velocity accelerates at a constant rate‚ the acceleration should remain constant. Therefore‚ if the participant is moving toward a positive direction and the speed increases‚ then the acceleration should be positive and constant. Materials * Ticker
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Chapter 9 Problems 1‚ 2‚ 3 = straightforward‚ intermediate‚ challenging Section 9.1 Linear Momentum and its Conservation 1. A 3.00-kg particle has a velocity of [pic]. (a) Find its x and y components of momentum. (b) Find the magnitude and direction of its momentum. 2. A 0.100-kg ball is thrown straight up into the air with an initial speed of 15.0 m/s. Find the momentum of the ball (a) at its maximum height and (b) halfway up to its maximum height. 3. How fast can you set the Earth
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vertically; there is no horizontal deceleration in the absence of aerodynamic forces. Acceleration is the same regardless of the weight of the implement. Therefore‚ the vertical velocity of a projectile decreases by 9.8 m/s every second. Linear Acceleration Acceleration is a measure of the time rate of change of velocity. Acceleration can be caused by a change in speed or direction or both. For example‚ a skater who goes from a standstill to full speed quicker than another skater has greater acceleration
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is 1.5 meters long‚ find the average speed of the ball. 5. * A stone tied on a rope has a frequency of 27 rpm. Find the average speed of the stone if the rope is 12 meters long. Centripetal Acceleration (ac) – the rate of change of tangential velocity; standard unit is meters per square second (m/s2); ac = v2/r = vω Sample Problem: 5. A metal ball is attached to a 1-m long string and is whirled to make 3 revolutions per second with the other end as the center. How much acceleration will the
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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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west and then 85 km southwest. Draw a vector diagram to represent this motion.What is the displacement of the car from the point of origin? 6. An airplane is traveling 735 km h-1 in a direction 41.5º west of north. (a) Find the components of the velocity vector in the northerly and westerly directions. (b) How far north and how far west has the plane traveled after 3.00 h? 7. A plane flies from base camp to lake A‚ a distance of 280 km at a direction of 20.0° north of east. After dropping off supplies
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includes the air resistance and different kinds of errors caused by students’ carelessness is different from the theory‚it is unaviodable that the results are quite different from the theoretic statistics. The horizontal velocity is related to the range‚ while the vertical velocity is related to the maximum altitude. This experiment can help us reinforce the concepts related to the motion in two dimensions although the water rocket does not have the ideal situation. A lot of equations we learned in
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Introduction to the Language of Kinematics Describing Motion with Words Scalars and Vectors Distance and Displacement Speed Velocity Acceleration Kinematics is the science of describing the motion of objects using words‚ diagrams‚ numbers‚ graphs‚ and equations. The goal of any study of kinematics is to develop sophisticated models which serve in describing (and ultimately‚ explaining) the motion of real-world objects. Much of our lives are spent in motion‚ travelling
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