Forces Assessment Prep
| # | Answer |
|---|---|
| 1 | A force is a push or pull on an object. |
| 2 | A robot can apply force by pushing, pulling, lifting, or pressing on something. |
| 3 | Newtons (N). |
| 4 | A push force. |
| 5 | The forces are balanced. |
| 6 | They do not change the motion, so the object stays still or moves at a constant speed in a straight line. |
| 7 | Unbalanced forces cause an object to speed up, slow down, or change direction. |
| 8 | Friction. |
| 9 | Friction is a force that resists motion when two surfaces rub against each other. |
| 10 | Carpet creates more friction, so the robot needs more force to move. |
| 11 | Gravity. |
| 12 | Gravity pulls objects toward the center of Earth. |
| 13 | The forces are balanced, or the push is not strong enough to overcome resistance. |
| 14 | Push, pull, friction, or applied force. |
| 15 | Gravity or magnetic force. |
| 16 | Magnetic force. |
| 17 | A compressive or squeezing force. |
| 18 | The forces are unbalanced, so the robot may turn or move in a different direction. |
| 19 | Because there is less friction. |
| 20 | A lighter object has less mass, so it is easier to move. |
| 21 | 0 N. |
| 22 | Net force is the total force after all forces on an object are combined. |
| 23 | 5 N to the right. |
| 24 | It will not accelerate; the forces are balanced. |
| 25 | Friction. |
| 26 | Treads increase traction and friction, helping the robot move without slipping. |
| 27 | A lever increases the force so the robot can lift with less effort. |
| 28 | Traction is the grip between a surface and a moving object, helping it not slip. |
| 29 | The button may not activate because the force is too small. |
| 30 | Because mass helps determine how much force is needed to move or lift the package. |
| 31 | 4 N to the right; it will likely move to the right. |
| 32 | 16 N. |
| 33 | 5 N backward. |
| 34 | Because a small unbalanced force can still change motion, especially if friction is low or the object is light. |
| 35 | Smooth narrow wheels would usually reduce resistance on smooth floors, so less force is needed. Wide treads increase grip but can also increase resistance. |
| 36 | Balanced. The upward force equals the downward force of gravity, so the speed stays constant. |
| 37 | The forces must be unbalanced, causing a change in direction. |
| 38 | The claw did not apply enough force to overcome the object's weight and any slipping force, so the grip was not strong enough. |
| 39 | It would be easier to lift objects because they would weigh less, but the robot might also have less traction because it presses down with less force. |
| 40 | Possible answers include stronger motors to provide more force, treads or better wheels for traction, a gripper or lifting arm for control, and sensors/braking to stop at the line. |