Verified Answers Solutions Lattest Update
2024,2025 {Graded A+}
-define vector ANSquantise with magnitude and direction
-List some vectors (6) ANSforce, velocity, displacement, weight, acceleration, momentum
-define scalar ANSquantities with magnitude but no direction
-list some scalar quantities (6) ANSspeed, distance, mass, energy, temperature, time
-define velocity ANSspeed in a given direction
-distance = ANSs x t
-walking speed = ANS1.4m/s
-running speed = ANS3m/s
-cycling speed= ANS5.5m/s
-cars in towns speed ANS13m/s
,-cars on motorway speed ANS31m/s
-trains speed ANS(up to) 55m/s
-wind speed ANS5-20m/s
-speed of sound in air ANS340m/s
-define acceleration ANSchange in velocity in a certain length of time
-acceleration = ANS(v-u)/t
-what causes acceleration of all objects in freefall to be equal ANSgravity
-accelerate due to gravity = ANS10m/s/s
-uniform acceleration = ANSv2-u2=2xaxx
-gradient on distance time graph = ANSspeed
-average speed = ANStotal distance/time
-gradient of velocity time graph = ANSacceleration
, -area under velocity/time graph = ANSdistance
-Newton's first law ANSa force is needed to change motion
-If the resultant force on a stationary object is zero ANSobject will remain stationary
-if resultant force on an moving object is zero ANSit will continue to move at the same speed
-five forms of an acceleration ANSstarting, stopping, speeding up, slowing down, changing direction
-the larger the resultant force on an object ANSthe more it accelerates
-relationship between force and acceleration ANSdirectly proportional
-force = ANSmassxacceleration
-Newton's second law ANSf=mxa
-safety features in cars designed to increase collision time to reduce force are ANSseatbelt, airbags,
crumple zones
-how does a vehicle skid (brakes) ANSbrakes do work on wheels, energy transferred from kinetic to
thermal stores, brakes overheat
-define mass ANSamount of stuff in an object