EVERYDAY SCIENCE

Detailed explanation-1: -As given in the problem if a car moves around a wide turn going 45 miles/hour the whole time, Even if the speed of the car is constant but the direction of the motion is changing continuously resulting in constant acceleration. Thus, an automobile makes a wide turn while traveling at a constant 45 miles per hour.

Detailed explanation-2: -Acceleration is defined as rate of change of speed So, if car is moving with constant speed that means rate of change of speed is zero. Hence, acceleration is zero.

Detailed explanation-3: -20. What is the acceleration of a car that maintains a constant velocity of 55 mi/hr for 10.0 seconds? If the velocity is constant, then there is no acceleration. That is, the value of the acceleration is 0.

Detailed explanation-4: -For the given case of a car travelling in straight line with the constant speed of 100 km/h, the acceleration of car is zero.

Detailed explanation-5: -No. For example, the car could be traveling at constant speed around a corner. In this case it‘s direction is changing and therefore it‘s velocity is changing. 2.