Abbey is doing the long jump at her school's athletics day. Her initial velocity is 2.0  m/s2.0  m/s and she accelerates for 8.0  s8.0  s. Her velocity is 7.0  m/s7.0  m/s when she jumps. Calculate Abbey's acceleration: 𝑎=𝑣−𝑢Δ𝑡a= Δtv−u​  Make sure to include appropriate units in your answer. Round your answer to two significant figures.

Hannah is cycling down a hill. Her velocity increases by 1 m/s1 m/s in 3 s3 s. Calculate Hannah's acceleration: 𝑎=Δ𝑣Δ𝑡a= ΔtΔv​

If the velocity of a particle is given by υ = (180 – 16x)1/2 m/s, then its acceleration will be :Zero8 m/s2– 8 m/s24 m/s2

Jamieson is competing in his school’s 3.0-metre diving competition. For his last dive, he is performing a forward somersault. The duration of the dive must be exactly 1.75 seconds or he will under- or over-rotate before hitting the water. He jumps upwards off the board with a vertical velocity of 6.0 m s−1 and takes $t$t​ seconds to land in the pool. Take the upwards direction as positive.Which of the following correctly describes the acceleration during the jump?A4.9 m s−2B−4.9 m s−2C9.8 m s−2D−9.8 m s−2

A skater increases her speed uniformly from 2.0 meters per second to 7.0 meters per second over a distance of 12 meters. What is the magnitude of her acceleration?A 1.9 m/s2B 2.2 m/s2C 2.4 m/s2D 3.8 m/s2

A rocket is taking off. Its initial velocity is 0m / s0m / s, and after 3535 seconds it is moving at 8000m / s8000m / s. Calculate the rocket's acceleration: 𝑎=𝑣−𝑢(Δ𝑡)a= (Δt)v−u​  Make sure to include appropriate units in your answer. Round your answer to two significant figures.