Determine with what force they act on the trolley if its speed has changed from zero to 3 m / s in 10 s.
| May 20, 2021 | education
Determine with what force they act on the trolley if its speed has changed from zero to 3 m / s in 10 s. Disregard friction.
m = 50 kg.
t = 10 s.
V0 = 0 m / s.
V = 3 m / s.
F -?
The force F, which acts on the trolley, we express according to 2 Newton’s law, the product of its mass m by the acceleration a, which this force imparts to it: F = m * a.
The acceleration of the body a is expressed according to the definition: a = (V – V0) / t, where (V – V0) is the change in the speed of the body, t is the time during which the change in speed occurs.
The force will be determined by the formula: F = m * (V – V0) / t.
F = 50 kg * (3 m / s – 0 m / s) / 10 s = 15 N.
Answer: a force F = 15 N. acted on the trolley.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.
