Mechanics | Relativity Answers

a motorbike together with its rider weighs 150 kg.how much work is needed to set its movement at 15 m/s?

Linear momentum

- By reference to Newton's laws of motion, deduxe that when two particles collide, momentum is conserved

light in a vacuum travels at a speed of 3.00x10^8 m/s. Pluto's average distance from the sun is 3.6 billion miles. How many minutes will it take sunlight to reach Pluto?

Sally travels by car from one city to another. She drives for 24.0 min at 54.0 km/h, 41.0 min at 33.0 km/h, and 24.0 min at 33.0 km/h, and she spends 13.0 min eating lunch and buying gas.

(a) Determine the average speed for the trip.
(b) Determine the total distance traveled.

A 500 g stone is thrown up with a velocity of 15 m/s.
find P.E at maximum height
find K.E when it hits the grond

to cross a river in the shortest time why the total distance crossed by the boat is more than the boat cross the river across to the shortest distance? to cross across to the shortest distance it takes more time than the time needed to cross the river in shortest time and this time the distance is more than the shortest distance. if we think generally to cross long distance it takes long time.but in this case why it is different ?

The distance between two successive peaks on a wave is the

A) wave's speed.
B) wavelength.
C) loudness.
D) frequency.
E) amplitude.

A mass of 0.50 kg is hung from a spring with spring constant 15.4 N/m. What is the period of oscillation?

What is the frequency of oscillation for the hanging mass?

You are walking around your neighborhood and you see a child on top of a roof of a building kick a soccer ball. The soccer ball is kicked at 49° from the edge of the building with an initial velocity of 13 m/s and lands 65 meters away from the wall. How tall is the building that the child is standing on?

Two ants race across a table 72 cm long.
One travels at 4.23 cm/s and the other at
3.99999 cm/s.
When the first one crosses the finish line,
how far behind is the second one?
Answer in units of cm