# G.c.c.mkd physics

posted by .

A 5kg mass is dropped from a height of 30m above the ground. Determine the velocity of the mass when it is 18n above the ground take = 10m/s2

• G.c.c.mkd physics -

v = vi - g t
h = ho - 4.9 t^2
18 = 30 - 4.9 t^2
t^2 = 2.45
t = 1.56 seconds
v = 0 - 9.8* 1.56
v = - 15.3 m/s
or
15.3 m/s down

## Respond to this Question

 First Name School Subject Your Answer

## Similar Questions

1. ### Physics

A body of mass 5kg falls from a height of 10m above the ground.what is the kinetic energy of the body just before it hits the ground.[g=10ms-2
2. ### physics

The two masses on either side of the pulley, 2.2 kg and 3.6 kg, are each initially 1.8 m above the ground, and the massless frictionless pulley is 4.8m above the ground.What maximum height does the lighter object reach after the system …
3. ### Physics

An object with mass 8.5kg is moving vertically upward with a velocity if 35m/s at a height of 100m above the ground. Find the time the object takes to reach the ground Thanks!!
4. ### physics

a mass is thrown vertically upwards with an initial velocity of 30m/s. a second mass is dropped 0.5s later from directly above the height of 60m from the mass. when do they meet and at what height?
5. ### Physics

The two masses shown in the figure are each initially 1.80 m above the ground, and the massless frictionless pulley is fixed 4.8 m above the ground. (mA = 1.5 kg and mB = 3.4 kg.) What maximum height does the lighter object reach after …
6. ### physics

a body of mass 5kg falls from a height of 10m above the ground. what is the kinetic energy of the body just before it strikes the ground answers K.E =1/2mg'2
7. ### physics

a brick of mass 2.0kg is dropped from a rest position 5.0m above the ground what is its velocity at a height of 3.0m above the ground [g=9.8meter per second square
8. ### Physics

A Stone Of Mass 1kg Is Dropped From Rest From A Window 20m Above The Ground.Another Stone Of Mass 0.5kg Is Dropped From A Height Of 5m Above The Ground . If Both Stones Are Dropped At The Same Time,find The Time Interval That That …
9. ### Physics

1) A 2.5kg durian falls from a tree with a height of 30m. Determine the energy before it falls in Joule. 2) A 2.5kg durian falls from a tree with a height of 30m. Determine the velocity when it drops 20m from the ground. 3) A 2.5kg …
10. ### Physics

Given the following about a spring: mass = 20.0 kg height initial = 5.25 m (above the ground) height final = 2.17 m (above the ground with the mass attached) delta y initial = 0.00 m There are several questions I must answer from this. …

More Similar Questions