a(child acceleration)=g(gravitational acceleration)*sin25=4.144 m/s2
.50g
A trajectory is the angle made with the horizontal when a projectile is fired. Suppose the projectile is a cannon ball. Assuming air is frictionless, that cannon ball will travel the greatest distance if the trajectory is 45 degrees from horizontal.
Either by degrees from the horizontal - or by foot rise per 1000 feet (or per mile).
the force acting down the slope = sin 30 * 25 (kg) = 0.5 * 25 = 12.5 kg = (12.5 * 9.806 ) 122.575 newtons = resultant force of (122.575-120 ) 2.575 newtons downhill giving downhill acceleration of (using f=ma) 0.103 (m/s)/s
sin20 = a/g a = gsin20 a = 3.35ms^-2
Yes
13
20 degrees is a measure of angular displacement. This cannot be converted to lateral (horizontal) displacement.
Yes. For example, a ball thrown vertically in the air has a positive velocity (upwards) but a negative acceleration due to gravity (downwards at ~9.81 m/s^2), until it begins to move downwards.
other horizontal lines? which would be 180 degrees i guess.
Extrapolate the experimental values of acceleration, vs. angle of the incline, to find the acceleration when the angle of inclination = 90 degrees. The acceleration at 90 degrees will equal 9.81 m/s/s, since this is the free-fall acceleration.
Horizontal beam width = 4.0 degrees Vertical beam width = 1.6 degrees