No, this is a pre-paid SIM for use in a phone only and you cannot use this particular SIM in a data only device such as an iPad, tablet or computer (T-Mobile can tell, apparently).
However, T-Mobile now allow tethering on their phone's monthly plans only (which means using the data from your phone as a personal hotspot - then your computer, tablet, iPad etc can connect to that hotspot) .
If you need stand alone wireless internet service for your computer, you may need to purchase a mobile broadband dongle when you get to the United States (Virgin Mobile is one of the few networks in the US that offers prepaid mobile broadband service). However free Wi-Fi hotspots are widespread throughout the United States so you may find that you can get buy without a dongle. If you find that relying on Wi-Fi hotspots is not satisfactory for your needs, then Best Buy electronics stores are a good place to sort out a mobile broadband dongle.