equations of motion for uniform acceleration.

Question 1

what is the equation for final velocity, involving initial velocity, acceleration and time?

Answer 1

final velocity= initial velocity +( acceleration
× time.)

Question 2

what is the re-arranged formula for final velocity?

Answer 2

a= v-u/t.

Question 3

work out t when u= 25.0 m/s, v= 0m/s and a= -2.5m/s².
using the formula: a= v-u/t.
what does the minus Infront of the -2.5 signify?

Answer 3

a= v-u/t.
-2.5= 0-25/t.
t= -25/-2.5.
t=10s.
slowing down.

Question 4

what equation will be given in the exam relating to this involving final velocity, initial velocity, acceleration and displacement?

Answer 4

(final velocity)² - (initial velocity)² = 2 ×
acceleration × displacement.

Question 5

work out a when u= 0.0m/s, v= 30m/s and s= 300m.
using the formula: v² -u² =2as.

Answer 5

v² -u² =2as.
v² -(35)² = 2(4)(300)
v²= 2(4)(300) + (35)²
v² = 3625.
v= √3625.
v= 60.2 m/s.