5. Differentiate between speed and velocity. The brakes applied to car produces mention of 10 msopposite direction to motion. If the car takes to water application of brakes, calculate the distance it travels during this time
Answers
Answer:
Correct option is
A
12 m
Given:
Accerleration: a=−6 m/s
2
Time t=2 s
Final velocity, v=0 m/s
v=u+at
0=u−6×2
u=12 m/s
s=ut+
2
1
at
2
s=12×2+
2
1
×(−6)×4
⇒s=12 m
Related questions
A body moving in straight line with uniform acceleration crosses at two points A and B with velocities 30 m/s and 60 m/s respectively. The speed of the body when it crosses one third of the distance between A and B after crossing from A is :
Speed is the time rate at which an object is moving along a path, while velocity is the rate and direction of an object’s movement. Put another way, speed is a scalar value, while velocity is a vector. For example, 50 km/hr (31 mph) describes the speed at which a car is traveling along a road, while 50 km/hr west describes the velocity at which it is traveling.
The mathematical calculation for speed is relatively straightforward, wherein the average speed of an object is calculated by dividing the distance traveled by the time it took the object to travel the distance. Velocity, on the other hand, is more complicated mathematically and can be calculated in different ways, depending on what information is available about the object’s motion. In its simplest form, average velocity is calculated by dividing change in position (Δr) by change in time