Hi, I have a Lab to learn how to move a robot and check the speed... the equatio

Question

Hi, I have a Lab to learn how to move a robot and check the speed... the equation is V(velocity)= distance / time. There are some mistakes,, and I'm not sure how to write the code... we might need to assume the distance one foot square but I'm not sure.

/**

* Drive the 3pi robot forwards a fixed distance and then stop.

*

* @param distance how far to drive [ft]

*

* @modifies the power being supplied to the robot's motors (on, then off)

*/

void driveForwards(double distance);

int main()

{

// Display battery level for 1s: 76

printBatteryLevel(76);

wait(1000);

// Wait for button B to be pressed before proceeding further:

clear();

moveCursor(0, 0);

print("Press B");

moveCursor(1, 0);

print("to drive");

waitForButton(BUTTON_B);

// Some values that we will need to drive the robot:

feet = 2; // how far we want to drive (in feet)

// Drive a fixed distance forwards and stop:

driveForwards(0 /*TODO: Fix this argument*/);

startMusic(SUCCESS);

clear();

print("Done!");

// Wait for the 'SUCCESS' tune to finish before exiting:

wait(2000)

// Required at the end of main():

return 0;

}

// TODO: Write definition for driveForwards

void driveForwards(double distance)

{

int DUTY = 40; //can range from 0 (0%) to 255 (100%)

double time = 1000; //in ms

setMotorPower(DUTY, DUTY);

wait(time);

setMotorPower(0, 0);

}

Explanation / Answer

The correct code is given below. Any value can be assigned to the variable feet depending on how much you want your robot to move.

* Drive the 3pi robot forwards a fixed distance and then stop.
*
* @param distance how far to drive [ft]
*
* @modifies the power being supplied to the robot's motors (on, then off)
*/
void driveForwards(double distance);
int main()
{
// Display battery level for 1s: 76
printBatteryLevel(76);
wait(1000);
// Wait for button B to be pressed before proceeding further:
clear();
moveCursor(0, 0);
print("Press B");
moveCursor(1, 0);
print("to drive");
waitForButton(BUTTON_B);
// Some values that we will need to drive the robot:
double feet = 2.0; // how far we want to drive (in feet)
// Drive a fixed distance forwards and stop:
driveForwards(feet /*TODO: Fix this argument*/);
startMusic(SUCCESS);
clear();
print("Done!");
// Wait for the 'SUCCESS' tune to finish before exiting:
wait(2000)
// Required at the end of main():
return 0;
}
// TODO: Write definition for driveForwards
void driveForwards(double distance)
{
int DUTY = 40; //can range from 0 (0%) to 255 (100%)
double time = 1000; //in ms
setMotorPower(DUTY, DUTY);
wait(time);
setMotorPower(0, 0);
}

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