Question:

A car of mass 1000 kg moves along a straight road with a constant acceleration of 2 m/s². The car starts from rest at time t = 0 s. Calculate the net force acting on the car at t = 5 s.

Answer:

Given data:

Mass of the car (m) = 1000 kg

Acceleration (a) = 2 m/s²

Time (t) = 5 s

To find the net force acting on the car, we can use Newton's second law of motion, which states that the net force (F_net) acting on an object is equal to the product of its mass and acceleration.

Mathematically, F_net = m * a

Substituting the given values:

F_net = (1000 kg) * (2 m/s²)

F_net = 2000 N

Therefore, the net force acting on the car at t = 5 s is 2000 N.

Answer: The net force acting on the car at t = 5 s is 2000 N.

Explanation:

Newton's second law states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. The equation F_net = m * a represents the relationship between force, mass, and acceleration.

In this case, we are given the mass of the car as 1000 kg and the acceleration as 2 m/s². To find the net force, we multiply the mass and acceleration together:

F_net = (1000 kg) * (2 m/s²) = 2000 N

The net force acting on the car is therefore 2000 N. This means that in order to maintain a constant acceleration of 2 m/s², a net force of 2000 N must be applied to the car.