Classical Mechanics Answers

What is my power rating if I can run up three storeys in 20s, given that each storey is 4m high and I have mass of 80kg

A train with a mass of 500 metric tons travels at constant velocity on a horizontal line and unleashes its last compartment which is with a mass of 20 metric tons. If the engine is turned off after moving another 240 m, what would be the distance between the last compartment and the train when it stops? Note that the force generated by the engine remains unchanged throughout the motion and the resistance force applied to each part is proportional to the mass.

A train with a mass of 500 metric tons travels at constant velocity on a horizontal line and unleashes its last compartment which is with a mass of 20 metric tons. If the engine is turned off after moving another 240 m, what would be the distance between the last compartment and the train when it stops? Note that the force generated by the engine remains unchanged throughout the motion and the resistance force applied to each part is proportional to the mass.

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away was the lightning bolt? (Ignore the travel time for the flash

An 80kg man is parachuting and experiencing a downward acceleration of

2.5m/s2 . The mass of the parachute is 5 kg.

(i) What is the value of the upward force exerted on the parachute by the air?

(ii) What is the value of the downward force exerted by the man on the parachute?

A ball is projected vertically upwards with an initial velocity of

30m/s. Neglecting air resistance and taking g to be 10m/s2.

a. Find its maximum height

(2)

b. The time taken to return to its starting point.

(3)

c. Plot a velocity-time graph for its downward motion

(4)

d. Predict what would happen to the time of flight if

Three masses arranged as shown on the right where 𝑚𝐴 = 2.00 [kg], 𝑚𝐵 = 1.00 [kg], and 𝑚𝐶 = 3.00 [kg]. What is the location of the center of mass? 

2 trains each traveling with a speed of 37.5km/h is aapproaching each other on the same straight track.a bird that can fly 60km/h flies off from one train when they are 90km and head directly from the other train .on approaching other train it flies back to the first and so on.total distance covered by bird is?

how many turns of solenoid is required to produce a magnetic field having magnitude of 3.0 T upon the application of 600A current if the solenoid is 8.50 m long and is having 4500 turns.  (note: \mu _(0)=4\pi x10^(-7)T. m/A).

Two objects with masses m1 and m2 are moving along the x-axis in the

positive direction with speeds v1 and v2, respectively, where v1 is less than

v2. The speed of the center of mass of this system of two bodies is

a) less than v1.

b) equal to v1.

c) equal to the average of v1 and v2.

d) greater than v1 and less than v2.

e) greater than v2.