Day3091 said:
Day3091 said:
##{1/2}\;gt^2## (an expression that does include a time!) gives me something else for ##t=2.48## s. And 1.999 m is not a speed. Could you show the complete exercise text and post your working (instead of some answer numbers)?Day3091 said:
To calculate acceleration from force and time, you can use the formula a = F/m, where a is acceleration, F is force, and m is mass. This formula is derived from Newton's Second Law of Motion, which states that the acceleration of an object is directly proportional to the net force applied to it and inversely proportional to its mass.
The SI (International System of Units) unit for force is Newtons (N) and the unit for time is seconds (s). Therefore, when calculating acceleration, the unit for force should be in Newtons and the unit for time should be in seconds.
Yes, acceleration can be negative when using the formula a = F/m. This indicates that the object is decelerating, or slowing down, due to a net force in the opposite direction of its motion. This is in line with Newton's Second Law, which states that acceleration is in the same direction as the net force applied.
The direction of acceleration can be determined by the direction of the net force applied. If the net force is in the same direction as the object's motion, the acceleration will be positive. If the net force is in the opposite direction of the object's motion, the acceleration will be negative.
Yes, the formula a = F/m can be used to calculate acceleration for an object with varying mass. In this case, the mass used in the formula should be the average mass of the object throughout the given time interval. Alternatively, the formula a = ∑F/m can be used, where ∑F is the sum of all the forces acting on the object and m is the instantaneous mass at that particular point in time.