Consider an object of mass 10 kg on a frictionless inclined plane of 20°. a. What is the acceleration of the object?
(object sliding down an inclined frictionless surface),
b. Calculate the acceleration if a mass of 20kg is used
c. What is the acceleration of the object if the angle of inclination is 90 degrees? Explain the significance of the result

Which is not a source of noise pollution? a)airplanes b)acid rain c)machines d)cars

Mass (kg) force (n) 5 25 10 50 15 75 20 100 a student was trying to find the relationship between mass and force. he placed four different masses on a table and pulled them using a spring scale. the table shows the different masses used in the experiment and the force required to pull each mass. the student concluded that more force was required to pull heavier objects. what comment would you make regarding his conclusion? a) no clear relation can be observed between mass and force from the data. b) there is a direct proportion between the mass and force listed in the table. c) gravity should have been taken into account while performing the experiment. d) there is an inverse proportion between the mass and force listed in the table.

Ineed the answer to question 1 , i’m desperate