12. A car accelerates uniformly at 3,5 m-s- from a speed of 10 m's-' for 5 s along astraight horizontal road.12.1 Define uniform acceleration.12.2 Calculate the velocity of the car at 5 s.12.3 Calculate how far the car travelled in 5 s.(3)(4)(4)13. The driver of a car travelling at 30 m's along a straight road brakes suddenly toa stop to avoid hitting a cow that is standing in the road. It takes him 3 s from thetime he sees the cow to the time when he applies the brakes. These 3 s are calledthe "reaction time". He slows down at a rate of 4 m's-?.13.1 What distance does the car cover during the 3 s of reaction time?13.2 What distance does the car cover during the time when the brakes areapplied?13.3 Draw a neat velocity -time graph of the car's motion from the time thedriver first saw the cow to the time that the car was brought to a stop. Ifnecessary calculate any relevant values which you need to draw this graph. (7)(3)(4)A train travels at a constant velocity of 22 ms along a straight railway tracktowards a level crossing. A mini bus, which is 4,5 m long, is stationary at the levelcrossing. The mini bus driver decides to cross the track. The mini bus is capableof accelerating at 2 m's- and the width of the track is 2,5 m.14.Final position: : Original positionof mini busof mini bus4.5 mTrain22 m-s1141 Calculate the shortest time it takes the mini bus to cross the railway track.14.2 How far away must the train be if the mini bus is to cross the track in(4)front of the train without colliding with it? Assume the train maintains aconstant velocity.(4)96 Grade 10 Physical SclencesG10_Tema_ResourcePack ind 6

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Chapter1: Units, Trigonometry. And Vectors

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Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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A ball is thrown with an initial upward speed of 25 m/s. ( g =9.81 m/s2) 1. What is the velocity of the ball when it is at its highest point? 2. What is the maximum height of the ball? 3. What is the acceleration of the ball at maximum height and how long does it take to get to the maximum height?
4. Angel starts to move from point O and travels in a straight line with v=2t cm/s and t is the time in seconds after leaving O. The particle comes to rest at P. Calculate a. The value of t at P b. The acceleration at P c. The distance from O to P 5. A body projected upward from the level ground at an angle of 50° with the horizontal has an initial speed of 4 m/s. (. a. How long will it take to hit the ground? b. How far from the starting point will it strike? c. At what angle with the horizontal will it strike? DYNAMICS 1. What weight W is necessary to start the system of blocks shown in Figure moving to the right? The coefficient of friction is 0.10 and the pulleys are assumed to be frictionless. What are the amount and direction of the frictions (Justify your answer 40 kN 60 kN w 20° 4. The blocks are separated by a solid strut which is attached to the blocks with frictionless pins. If the coefficient of friction for all surfaces is 0.20, a. determine the value of horizontal force P…
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1. A car is travelling towards the start line and the timer starts timing when the car crosses the start line. When the car crosses the start line, it is travelling at 5 m.s1. The car maintains its speed for 3 seconds then speeds up to 8 m.s1 in 4 seconds. It maintains this speed for 1 second then brakes hard and comes to a rest in 3 seconds. 10 9. 8. 7 3 2 1 0. 0 1 2 3 4 7 8 9 10 11 Time (s) a) What is the instantaneous velocity of the car at t = 7 s? b) What is the displacement? c) What is the average velocity of the car for the journey? 5 4- Velocity (m/s)
4. CHALLENGE PROBLEM. John hopes to finish a 10,000-m run in less than 30.0 for him to reach the speed of 60 m/s? Direction: Solve the following problems. Show your complete solutions legibly a slow-moving dump truck. If he can accelerate at 5 m/s?, how long will it take 3. John is driving his sports car down a four-lane highway at 40 m/s. He overtakes 1. A golf ball rolls up a hill toward a miniature golf hole with a speed of 2.0 m/s and consume at an acceleration of 0.20 m/s² in order to achieve the desired time? min. After 27.0 min, there are still 1100 m to go. How many seconds must he Activity 2.11: One Dimensional Uniformly Accelerated Motion Problems 2. An airplane accelerated uniformly from rest at the rate of 5.0 m/s2 South for slows at a constant rate of 0.50 m/s2. What is its velocity after 2.0 s? 14 s. What final velocity did it attain? and concisely in a separate sheet of paper.
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9. A ball is dropped from rest from a very tall building. Gravity accelerates the ball at 9.8 m/sec?. How fast is the ball traveling after 1.5 seconds? A. 14.7 m/sec B. 24.7 m/sec C. 34.7 m/sec D. 44.7 m/sec 10. A ball is dropped from rest from a very tall building. Gravity accelerates the ball at 9.8 m/sec2. What distance did the ball travel in the 1.5 seconds? A. 6.025 m В. 11.025 m С. 16.025 m D. 21.025 m
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12. A car accelerates uniformly at 3,5 m's from a speed of 10 m's for 5 s along a straight horizontal road. 12.1 Define uniform acceleration. 12.2 Calculate the velocity of the car at 5 s. 12.3 Calculate how far the car travelled in 5 s. (3) (4) (4)