1. The velocity-time graph of a car is given below.
From the graph, answer the following question.
(i) What type of motion is represented by OA?
(ii) State, how the distance traveled in any section is determined?
(iii) In which section car has zero acceleration?
(iv) What is the acceleration of the car from O to A?
(v) What is the retardation of the car from B to C?
Answers
Explanation:
(i) As speed - time graph OA is a straight line with a positive slope , the motion is uniformly accelerated motion.
(ii) When the velocity of a moving object's velocity is constant (and positive), the area under the velocity curve over an interval of time tells us the distance the object traveled. Figure 4.1. 2. At left, a constant velocity function; at right, a non-constant velocity function.
(iii) Car has zero acceleration in section BC because there is no change in velocity from B to C.
(iv) Acceleration is the rate of change of velocity as a function of time. For example a car traveling at 50 km/hr starts to accelerate, 10 seconds after, its speed changes to 100 km/hr then the acceleration of the car during the time can be calculated as below: initial speed = 50 km/hr.
(v) OA represents uniform acceleration
Answer:
Explanation:
(i) As speed - time graph OA is a straight line with a positive slope , the motion is uniformly accelerated motion.
(ii) When the velocity of a moving object's velocity is constant (and positive), the area under the velocity curve over an interval of time tells us the distance the object traveled. Figure 4.1. 2. At left, a constant velocity function; at right, a non-constant velocity function.
(iii) Car has zero acceleration in section BC because there is no change in velocity from B to C.
(iv) Acceleration is the rate of change of velocity as a function of time. For example a car traveling at 50 km/hr starts to accelerate, 10 seconds after, its speed changes to 100 km/hr then the acceleration of the car during the time can be calculated as below: initial speed = 50 km/hr.
(v) OA represents uniform acceleration