5.The average person passes out at an acceleration of 7g (that is, seven times the gravitational acceleration on Earth). Suppose a car is designed to accelerate at this rate. How much time would be required for the car to accelerate from rest to 70.7 miles per hour? (The car would need rocket boosters!) 4. Two boats start together and race across a 46-km-wide lake and back. Boat A goes across at 46 km/h and returns at 46 km/h. Boat B goes across at 23 km/h, and its crew, realizing how far behind it is getting, returns at 69 km/h. Turnaround times are negligible, and the boat that completes the round trip first wins. Which boat wins? (Or is it a tie?)By how much? (km/h) What is the average velocity of the winning boat? (km/h)
Displacement, Velocity and Acceleration
In classical mechanics, kinematics deals with the motion of a particle. It deals only with the position, velocity, acceleration, and displacement of a particle. It has no concern about the source of motion.
Linear Displacement
The term "displacement" refers to when something shifts away from its original "location," and "linear" refers to a straight line. As a result, “Linear Displacement” can be described as the movement of an object in a straight line along a single axis, for example, from side to side or up and down. Non-contact sensors such as LVDTs and other linear location sensors can calculate linear displacement. Non-contact sensors such as LVDTs and other linear location sensors can calculate linear displacement. Linear displacement is usually measured in millimeters or inches and may be positive or negative.
5.The average person passes out at an acceleration of 7g (that is, seven times the gravitational acceleration on Earth). Suppose a car is designed to accelerate at this rate. How much time would be required for the car to accelerate from rest to 70.7 miles per hour? (The car would need rocket boosters!)
4. Two boats start together and race across a 46-km-wide lake and back. Boat A goes across at 46 km/h and returns at 46 km/h. Boat B goes across at 23 km/h, and its crew, realizing how far behind it is getting, returns at 69 km/h. Turnaround times are negligible, and the boat that completes the round trip first wins. Which boat wins? (Or is it a tie?)By how much? (km/h) What is the average velocity of the winning boat? (km/h)
The solution to both the questions is given by using basic relations of velocity, acceleration and time. Also, using kinematic equations.
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