Question

A particle P moves from O at time t = 0 along a strainght line such that it's displacement, measunred in meters, from O, after t second is 3t² + 2t. Calculate the time taken for P a) to reach a speed of 20m/s.
b) to travel 8m from O.
A second particle Q moves along the same straight line and in the same direction as P, with constant speed 5m/s.
c) write down, in terms of t, the distance travelled by Q in t seconds.
Particles P and Q both have O at the same time.
d) Calculate how long it will take for P to overtake Q.​

Answer 1

Answer:

Disadvantages of using ""plastics""

are:

They pollute our environment.

They pose a danger to wildlife.

They do not degrade quickly.