A cat accelerates from rest to 10m/s when it sees a dog. This takes 2 seconds. What was the acceleration of the cat

the term is hydrogen bridge.

As the parachutist is descending at a steady rate

we can conclude that

Acceleration indicates the change in velocity

given the constant velocity in this scenario

Thus, in this situation, we find the acceleration to be zero

It’s understood from Newton's second law

where a is equal to 0

Here, the force due to gravity

equals the force due to buoyancy

Hence, we can deduce

therefore

as such the upward force is counteracted by the downward force.

Answer:

2 m/s²

Explanation:

The work done can be calculated using the equation:

Work = Force x Distance = Change in kinetic energy

The kinetic energy is derived using the following formula: KE = (1/2)*m*v^2
Thus, the change in kinetic energy is calculated as (1/2)*m*(Vf)^2 - (1/2)*m*(Vo)^2

Where:

Vf represents the final speed = 90 kph = 25 m/s
Vo denotes the initial speed = 72 kph = 20 m/s

By substituting in the given values:

Work = (1/2)*2500*(25^2) - (1/2)*2500*(20^2) = 281250 J, which can also be represented as 2.8 x 10^5 Joules.

The correct choice among the options is A.