If there is 50 J of elastic potential energy stored in a spring that is used to cause motion in a 7kg block what velocity would the block move if on a frictionless surface - not enough information to solve
- 14.3 m/s
- 46.5 m/s
- 3.78 m/s

answer: the rock sample is a sedimentary rock.

explanation:

it is given that:

mass of rock sample, m = 2.7 g

volume of rock sample,

so, density of rock sample will be

since, the density of rock sample is . hence, the rock sample is a sedimentary rock, whose densities varies between .

can be answered using momentum.

momentum = p

p1= mass1 * velocity1

p1 = p2

therefore

p1 = 6kg * 4m/s

p1 = 24kgm/s

p2=m2 * v2

24 kgm/s = 7kg * v2

v2 = 24 kgm/s / 7kg

v2= 3.42 m/s

f is prop to m1xm2 double m1 double force