Y7 science Q:

[ampere]

What happens to the forces acting on an object (say a car) when the object speeds up?

Slows down?

I assume 'the forces' are friction (via 'drag' through the air and gravity. Bearing in mind this is Y7, are they all?

I think you might also have to talk about the forces that are making the object speed up or slow down.

It is about the balance of the forces. Yr7 work is simply starting with the balance of forces.
When a item speeds up the force forward is greater then the friction acting on the object.

Good, tried not to confuse the issue. I'd've been it there with my mass, weight, Newtons, kgs and gravity in no time at all- and would probably have got it all wrong!

Balanced forces = travelling at a steady speed or stopped. Unbalanced forces = accelerating or decelerating. So if speeding up the forward horizontal force (thrust from the engine) is greater than the friction (which is actually a resultant force) and any air resistance/weight of the car.