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- 1. The diagram below gives the velocity-time graph for a particle travelling along the х-ахis. 60 V(m/s) 40 20 10 20 30 40 50 t (s) Calculate: (i ) the acceler ati on during the first 10s. (ii ) the total di stance travelled. (iii) the deceleration during the last 10s.16 A Ya and ari fighter-craft accelerates Qt a constat rate ) Starting out at rest relative e to ocr frame Of reference ,It reahes a 2. Speed of 25oo m/s in a time of 120-0min a Find The acceleration magnitude of the fighter-c raft, in )Express The accelera tion 19=9.8 g nagnitude above in terms of g's, whereAta a traffic light, a vintage Vw Beetle traveling at 1o mls. a tesla as it stars fromrest.the beetle traveis at a constant passes velocity and the tesla acceierates at 4 mis. How much time does it tale the tesla to catch up to the Vw Beetlc. 55 bs Olos 25
- 104. The position versus time for a certain particle moving along the z ais is shown in the right figure. Find the average velocity in the following time (m) 10 2 intervals 457 For O to 2s ( ) m/s. For O to 44( M. -2 For 1 to 74-( 2 i m For 1 to 61r( 1 m/s For O to 7s -( 1 msA ball is thrown into the air by a baby alien on a planet in thesystem of Alpha Centauri with a velocity of 49 ft/s. Its heightin feet after t seconds is given by y = 49t −25t2.a.) Find the average velocity for the time period beginningwhen t0 = 1 second and lasting for the given time.t = .01 sec:t = .005 sec:t = .002 sec :t = .001 sec: b.) Estimate the instanteneous velocity when t = 1.Phys2425 3. If you throw one object upward with an initial speed of 4m/s at 1.5m above the ground, find a) the total time of flight for this free fall motion, b) the final velocity just before touching the ground, and c) the maximum height with respect to the ground. 28
- 1039. A car accelerates for t sec from rest to a velocity of 48 ft per sec, the accelera- tion increasing uniformly from zero to 12 ft per sec?. During the next 4 sec, the car decelerates at a constant rate to a velocity of 4 ft per sec. Sketch the a-t, v-t, and 8-t curves.. Distance and Time Anthony leaves Kingstown at 2:00 p.m.and drives to Queensville, 160 mi distant, at 45 mi/h. At2:15 p.m. Helen leaves Queensville and drives to Kingstownat 40 mi/h. At what time do they pass each other on theroad?1. A car starting from rest picks up at a uniform rate and passes three electric posts in succession. The posts are spaced 340 m apart along a straight road. The car takes 10 seconds from 1" post to 2 post and 6 seconds from 2d post to 3" post. Compute for the following: a. Acceleration of the car in m/s b. Velocity of the car as it reaches the first post. e. Distance from the starting point to the first point.
- 3. A particle is moving along a straight line according to the equation of motion s = t³ – 40t where s is in meters. Calculate the following: (a) The instantaneous velocity at t=5sec. (b) The average velocity during the fourth second. (c) When the particle again comes to rest, what is its acceleration?A. Both balls (A and B) would hit the ground at the same time t = 1s. B. Both balls (A and B) would hit the ground at the same time t = C. Both balls (A and B) would hit the ground at the same time t D. Ball A would hit the ground after time t = E. Ball A would hit the ground after time t = 2s. 1.5s. 1s and ball B would hit the ground after tim 2s and ball B would hit the ground after tim A ball is kicked from the ground at point 0 with an initial velocity va = 20 m/s that makes an angle 0 point A and then returns to the ground at point B as shown in the figure. (g = 10m/s) The time taken by the ball to reach the maximum height at point A (toA) is equal to: 300 with the horizontal. This ball reaches its maximum height at A A. 0.5 s B. 1s C. 1.5 s D. 2s E. 2.5 s hmax12. You are driving home from at 85.0 km/h for 130. km, then you slowed down to 70.0 km/h. You arrived home after driving 3.00 hours and 10.0 minutes. What was your average speed in mete/h * O a) 73000 O b) 75 152 O c) 77 200 O d) 77500 nota