`V_1 = V_2 + "h" / "t" `

Enter a value for all fields

The Speed to Overtake in Time calculator computes the average speed required to overtake a vehicle based on the speed of the vehicle, the head start, and the total distance.

INSTRUCTION: Choose units and enter the following:

• (h)  Distance between Vehicles (i.e. the head start)
• (V₁) Velocity of Chase Vehicle
• (t) Time in which Chase Vehicle must catch Lead Vehicle

Speed to Overtake (V₁) The calculator returns the speed in miles per hour.  However, this can be automatically converted to compatible units via the pull-down menu.

NOTE: This works if the lead vehicle is heading back.  Just use a negative velocity and it will tell the velocity to intersect in the specified time.

Related Calculators

• Time to Overtake: Computes the distance in which the overtake will occur at constant velocities.
• Distance to Overtake: Computes the distance in which the overtake will occur at constant velocities.
• Speed to Overtake by a Distance: Computes the speed required to intercept within a distance boundary.
• Speed to Overtake in Time: Computes the speed required to intercept within a time boundary.

The Math / Science

The formula for the speed required to overtake in time is:

        V₁  = V₂ + h/t

where:

• V₁ is the velocity or speed to overtake
• t is the time when vehicle 1 must overtake vehicle 2.
• h is the distance between the vehicles or the head-start.
• V₂ is the velocity of vehicle two.

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Forensic Science Calculators

• Time to Overtake: Computes the time for one object to overtake another.
• Distance to Overtake: Computes distance traveled to overtake another.
• Speed to Overtake by Distance: Computes the average velocity to overtake another within a specified distance.
• Speed to Overtake by Time: Computes the speed needed to overtake within a specified time.
• Distance at Speed: Computes the distance traveled over a period of time at a constant velocity (speed)..
• Braking Distance: Computes the distance to stop a vehicle based on the initial velocity (vi) and the a braking coefficient (μ).
• Total Stopping Distance: Computes the distance to stop a vehicle based on the initial velocity (vi), reaction time (t) and the a braking coefficient (μ).
• Speed from the Braking Distance: Estimates the initial speed based on the distance to stop a vehicle (d) and the a braking coefficient (μ).
• Speed from Length of Skid Marks: Estimates the speed based on the length of skid marks and the friction coefficient.
• Minium Drive Time between Coordinates: Computest the minimum time it would take to drive between two GPS coordinates in a straight line at a specified speed.
• Time of Death: Computes the amount of time since a human has died based on the current body temperature and the ambient temperature of the air around the body.
• Time to Sink: Estimates the time it takes for the inflow of water to surpass the vessel's displacement based on the vessel's displacement and the flow rate of sea water entering the hull and the bilge pump rate out.