Right.annalian said:Homework Statement
An object is thrown horizontally and after 3 seconds the speed vector forms the angle pi/4 radians with the horizontal direction. FInd the speed after 4 seconds.
Homework Equations
v=gt
The Attempt at a Solution
As it forms the angle pi/4 radians, vx=vy, so
v0=gt=3*10=30
vy when t=4 is 40m
v=sqrt(vx^2+vy^2)=50m Am I right
Except for the units.cnh1995 said:Right.
The formula for finding speed is speed = distance/time. This means that the speed of an object is equal to the distance it travels divided by the time it takes to travel that distance.
To calculate speed, divide the distance traveled by the time it took to travel that distance. For example, if an object travels 20 meters in 5 seconds, its speed would be 20 meters/5 seconds = 4 meters per second.
Yes, the speed of an object can be calculated at any given time as long as the distance and time are known. You would use the same formula of speed = distance/time, but with the specific distance and time values at that given time.
Speed is typically measured in meters per second (m/s) or kilometers per hour (km/h). However, it can also be measured in other units such as miles per hour (mph) or feet per second (ft/s).
In addition to distance and time, other factors that can affect an object's speed include acceleration, mass, and external forces such as friction or air resistance. These factors can either increase or decrease an object's speed.