2.An object is thrown up into the air with an initial velocity of an initial velocity of 40m/s. Neglect air friction. How long does it take to reach the high point?

How high does it rise?

Where is the object and how fast is it moving 8.16 seconds after it was released?

3. A car starts moving from rest along a straight line and accelerates uniformly at a rate of 2m/sq for 5 seconds.

What is the final velocity reached after 5 seconds?

How far did it move during this time?

With the same acceleration (2m/sq), how long will it take to move 60 meters beyond the starting point?

explanation:

earth's surface is mainly heated by the absorption of infrared radiation from the sun.

evaporation occurs because molecules in liquid water are warmed ( usually by the sun) and vibrate quicker, becoming less dense and rise.

condensation occurs because molecules in water vapor are cooled and therefore vibrate more slowly thus becoming more dense and eventually fall to earth.

lines of equal barometric pressure on a weather map are called: isobars : lines of equal temp on a weather map are called: isotherms.​

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

                                              ⇒      

here   k is the proportionality constant whose value is 1.

                                                            [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.