Someone standing at the edge of the cliff throws one ball straight up and anothe

Question

Someone standing at the edge of the cliff throws one ball straight up and another straight down at the same initial speed, neglecting air resistance, the ball to hit the ground below the cliff the greater speed will be the one thrown upward the one thrown downward neither- they will both hit with the same speed A 10-N falling object encounters 4N of air resistance. The net force on the object is 0N 4 N 6 N 10 N None of these Compared to a 1-kg block of solid iron, a 2 kg block of solid iron has the same Volume mass weight all of these none of these The force of friction on a sliding object id 10 newtons. The applied force needed to constant velocity is more than 10N 10 N less than 10 A car accelerates from rest for 5 seconds until it reaches a speed of 20 m/s. What the acceleration in meters per second per second? 4 3 2 1

Explanation / Answer

6)

as volume = mass/density

as density is same for both

the correct option is

D) all of the above

7)

Using Third law of Newton

the magitude of both forces is equal in magnitude

the correct option is

D)

8)

Using Third law of Newton

the magitude of both forces is equal in magnitude

the correct option is

A) the same for both

9)

as the initial energy at the top of cliff is same for both the balls

as there is no air resistance

according to conservation of energy

both balls have energy at the surface of ground

both will have same speed

C) neither -they will both hit the same speed

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