A 1000-kg car is moving at 30 m/s around a horizontal unbanked curve whose diameter is 0.20 km. What is the magnitude of the friction force required to keep the car from sliding?

A box rests on the (horizontal) back of a truck. The coefficient of static friction between the box and the surface on which it rests is 0.18. What maximum distance can the truck travel (starting from rest and moving horizontally with constant acceleration) in 4.0 s without having the box slide?   Question 7 options:   8 m   28 m   3.5 m   11 m   14 m

26. Review Conceptual Example 7 in preparation for this problem. In tests on earth a lunar surface exploration vehicle (mass = 5.90 × 10° kg) achieves a forward acceleration of 0.220 m/s². To achieve this same ac- celeration on the moon, the vehicle's engines must produce a drive force of 1.43 X 10° N. What is the magnitude of the frictional force that acts on the vehicle on the moon?

A 9.00 kg object is dropped from rest near the surface of an unknown planet and begins to accelerate at 6.00 m/s2. What is the weight of the object on the unknown planet?