A 35 N net force acts on a go-kart for 2.0 s. The impulse is 70. Seventy what? A bare number is not a measurement.
Impulse needs a unit of its own. Which unit?
Impulse is net force times the time the force acts: J = FΔt.
Force carries newtons. Time carries seconds.
Multiply the quantities, and the units multiply too: newtons times seconds.
The SI unit of impulse is the newton-second, written N·s.
So the go-kart's impulse is written J = 70 N·s, and an impulse of 50 N·s is a smaller one.
Which is the SI unit of impulse?
A 12 N net force acts on a cart for 3.0 s. The impulse is 36 ___. Which unit completes the value?
Every impulse value carries this unit.
A lab report states an impulse of 28 N·s. Is the unit correct for an impulse?
An 8.0 N net force acts on a cart for 4.0 s, so J = 8.0 × 4.0 = 32. Write the impulse with its unit.
Force in newtons times time in seconds gives N·s.
J = 32 N·s.
A record reads: impulse = 44 N. What is wrong with the record?
N is the unit of force alone.
An impulse is force times time, so its unit multiplies N by s.
The record should read 44 N·s.
A student's record reads: net force 15 N, time 2.0 s, impulse 30 ___. Which unit completes the record?
Which measurement could be an impulse?
The unit N·s comes from multiplying which two units?