Other Physics Answers

on a hypothetical planet X with an unknown value for g, the period of a swinging pendulum with a string length of .75 meters is a 1.8 s calculate the value of "g" on plnaet X

An anti-aircraft shell is fired vertically upward with a muzzle velocity of 100m/s. Calculate the maximum height it can attain

A body at rest is given an initial uniform acceleration of 8.0m/s for 30s after which the acceleration is reduced to 5.0m/s for the next 20s.Draw the velocity-time graph of the motion using the information given above. Using the graph, calculate the (I) maximum speed attained during the motion. (ii) average retardation as the body is being brought to rest. (iii) total distance travelled during the first 50s. (iv) average speed during the same interval as in (ii).

A body at rest is given an initial uniform acceleration of 8.0m/s for 30s after which the acceleration is reduced to 5.0m/s for the next 20s. Draw the velocity-time graph of the motion using the information given above. Using the graph, calculate the (I) maximum speed attained during the motion. (ii) average retardation as the body is being brought to rest. (iii) total distance travelled during the first 50s. (iv) average speed during the same interval as in (ii).

A body at rest is given an initial uniform acceleration of 8.0m/s for 30s after which the acceleration is reduced to 5.0m/s for the next 20s. Find the average retardation as the body is being brought to rest

What force should be applied so that a 10kg block accelerates at 5.0m/s2 up a 20° inclined plane as it is pulled from the top? The object's coefficient of kinetic friction is 0.10.

Two wires were used to suspend a 50kg object. The first cable is attached at 45° to the ground, while the second cable is attached at 30° to the ground. What is the value of T₁ and T₂?

A 12kg mass is put on a 30° frictionless inclined plane and is coupled to a pulley that is connected to a 5kg hanging mass. What is the system's acceleration?

b) An escalator at an airport has an acceleration function

a       =      [6.33t² i  - 16.8t³ j] mm s^-2

         Determine the escalator’s velocity 1.2 s after a person steps on it.  

c)    If a force vector F = {12i + 13j – 14k}N, what is its unit vector?

Q4    a)     Distinguish between systematic errors and random errors.

b)     What is s and its uncertainty, if s = a³bc^1/2 / d, where:

         a       =      (3.00  0.150) m

         b      =      (2.30  0.30) s²

         c       =      (49  0.3) kg⁴

         d      =      (150  10.5) m

When the speed of a fluid flowing in a pipe increases, what happens to the internal

pressure in the fluid?