# MCAT Physics 1

 Average velocity Vavg = (V1 + V2) / 2 Determining height reached Time to reach peak * average velocity Determining horizontal distance Total time in air * X component of Vinitial Net force = 0 means... No acceleration. Can however have velocity but a = 0 If volume changes, is work being done? Yes Tension is... Vector attributes Has both magnitude and direction. Scalar attributes Has only magnitude Newton's first law The velocity of a body remains constant unless the body is acted upon by an external force. Newton's second law F=ma Newton's third law For every action there is an equal and opposite reaction. Inertia definition The ability of an object to resist a change to its velocity. Center of Mass formula Cmass = (r1m1 + r2m2 + r3m3...)/mtotal r - the displacement vector between a reference point and each vector. Center of gravity At the center of mass. Center of buoyancy The geometric center, irrespective of the center of mass. "Constant Velocity" or " Constant Speed" means No accelerationNo NET forceAll forces sum to zeroNo change in directionThe object is in equilibrium Distance or height traveled formula Distance = rate * time Range (horizontal distance traveled) formula Range = Vx * time When facing projectiles think: Horizontal velocity never changes (ignoring wind resistance)Horizontal acceleration always = 0Vertical acceleration always = 10 m/s2Vertical behavior is always symmetrical (upward = downward)Time in the air depends on the vertical component of velocity only.Range depends on both the vertical and horizontal components. Time is always the same for both the x and y components of the motion. Formula for displacement in projectile motion X = 1/2at2 Formula for final velocity when only height is given V = √(2gh) Formula for "round trip" or total time in air tair = 2V/g V must be the vertical component of initial velocity The effect of surface area on air resistance Greater surface area = more air resistance The effect of shape on air resistance Less aerodynamic = more air resistance The effect of contour on air resistance Rough surface = more air resistance The effect of velocity on air resistance Greater velocity = more air resistance AuthorMaki6tu ID134466 Card SetMCAT Physics 1 DescriptionPhysics 1 Updated2012-08-02T19:34:36Z Show Answers