a pupil pushes a wheelbarrow carrying 20kg of sand. It accelerates from rest to 8m/s in the distance of 2m. What is the acting force on the wheelbarrow?
a = 16 m/s^2
F = ma
physics
a pupil pushes a wheelbarrow carrying 20kg of sand. It accelerates from rest to 8m/s in the distance of 2m. What is the acting force on the wheelbarro
To find the acting force on the wheelbarrow, you can use Newton's second law of motion, which states that the force acting on an object is equal to the mass of the object multiplied by its acceleration.
First, let's determine the mass of the wheelbarrow and the sand it carries. The total mass is given as 20 kg.
Next, we need to find the acceleration of the wheelbarrow. The formula for acceleration is:
acceleration = (final velocity - initial velocity) / distance
The initial velocity is 0 m/s since the wheelbarrow starts from rest. The final velocity is 8 m/s, and the distance is given as 2 m.
Let's substitute the values into the formula:
acceleration = (8 m/s - 0 m/s) / 2 m
acceleration = 4 m/s²
Now we have both the mass and the acceleration. We can plug these values into Newton's second law to find the force acting on the wheelbarrow:
force = mass × acceleration
force = 20 kg × 4 m/s²
force = 80 Newtons
Therefore, the acting force on the wheelbarrow is 80 Newtons.