Ekwazzjoni tal-impuls

3 mistoqsijiet dwar l-ekwazzjoni tal-impuls

1. Karozza b'massa ta' 250 kg qed tiċċaqlaq b'veloċità ta' 72 km/siegħa, imbagħad tiġi aċċellerata b'forza kostanti sabiex f'5 sekondi l-veloċità tagħha ssir 80 km/siegħa. Iddetermina l-impuls għal 5 sekondi

Magħruf:

Il-massa tal-karozza (m) = 250 kg

Veloċità inizjali (v_o) = 72 km/s = 20 m/s

Veloċità finali (v_t) = 80 km/s = 22 m/s

Intervall ta' ħin (t) = 5 sekondi

Mfittxija: Iddetermina l-impuls (I)

soluzzjoni:

Impulse formula: Impulse = Change in momentum

I = Δp

I = m (v_t - v_o) = (250)(22 – 20) = (250)(2)

I = 500 kg m/s

2. An object with a mass of 0.4 kg initially moving with a speed of 20 m/s is stopped by a constant force of 50 N in a certain time. How big is the impulse?

Magħruf:

Massa (m) = 0.4 kg

Velocity (v_o) = 20 m/s

Veloċità finali (v_t) = 0 m/s

Forza (F) = 50 N

Mfittxija: Impulse (I)

soluzzjoni:

Impulse formula: Impulse = Change in momentum

I = Δp

I = m (v_t - v_o) = (0,4)(0 – 20) = (0,4)(-20)

I = 8 kg m/s

3. An object with mass m is moving at a constant speed v, so the impulse of the object is…

Soluzzjoni

Impulse = change in momentum. Momentum changes when mass or velocity changes. So if the speed and mass are constant then there is no change in momentum. So that there are no impulses.