PH-155
Friction and air resistance
Physics · Secondary 3 · Hard · Friction and air resistance
A 1.2 kg cart moves at a constant speed of 2.0 m/s along a straight, rough track. The driving force on the cart is 4.0 N. What is the frictional force acting on the cart?
- 0 N
- 2.0 N
- 4.0 N
- 8.0 N
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