Other Physics Answers

A stone was thrown vertically upward and it rised 10m above its initial location before it 

started to fall. What was its initial velocity?

A jeepney was traveling with a velocity of 20 m/s when the driver stepped on the brake 

pedal. The jeepney traveled 4m away until it came to a full stop. How long did it take the 

jeepney to stop after the brake was applied?

From the edge of the roof of a building that is 30 m high, a stone was thrown horizontally 

with a velocity of 15 m/s. How long did it take the stone to touch the ground?

A train of total mass 300 tonnes (3×10^5kg) is moving up an incline of angle ∆ to the horizontal, where sin∆=1/280.The resistance to motion is 3000N and the train is accelerating at 0.2ms^-2. Find (a)the driving force of the engine. (b) the power exerted by the driving force at the moment when the speed is10ms^-1.

Find (a) a basis for and (b) the dimension of the solution space of the 

homogeneous system of linear equations.

1.

x−2y +3z= 0

−3𝑥x +6𝑦y -9z = 0

Q1 Ocean tides are waves that have a period of 12 hours, and a speed of 50 km/h. What is the distance between adjacent crests of these waves?

a.

23 km

b.

4.2 km

c.

45 km

d.

600 km

e.

454 km

a 150g ball at the end of a string is revolving uniformly in a horizontal circle of radius 0.6 m .the ball makes 2 revolutions in a second what is it’s centripal acceleration

A 30 kg falling object hits the ground at a speed of 11.5 m/s. If the kinetic energy of the object when it hits the ground is equal to the gravitational potential energy it had before it was dropped, at what height was it dropped from?

A spring with a spring constant of 5 N/m is compressed by a force of 1.2 Newtons a distance of 0.11m. What is the total elastic potential energy stored in the compressed spring?

A rifle can shoot a 3.8 x 10^-2kg bullet at the speed of 790 m/s

Calculate the kinetic energy of the bullet as it leaves the rifle?

When that is solved the next question is if the bullet is 2 meters above the ground at that moment, what is the potential energy?