what force is needed to accelerate at child on a sled at 1.4 meters per second square (total mass 55 kilo gram)
F = ma = 55 * 1.4 = 77N.
To calculate the force needed to accelerate a child on a sled, we can apply Newton's second law of motion, which states that force (F) is equal to the mass (m) multiplied by the acceleration (a):
F = m * a
Given:
Mass (m): 55 kg
Acceleration (a): 1.4 m/s^2
Plug in the values into the formula:
F = 55 kg * 1.4 m/s^2
Now, we can calculate the force:
F = 77 Newtons
Therefore, a force of 77 Newtons is needed to accelerate the child on the sled at a rate of 1.4 meters per second squared.