Physics

1A car of mass 1,000 kg rounds a bend of radius 50 m at 10 m/s. The friction force needed is

2A body on a rough plane begins to slide when the plane is tilted to 30°. The coefficient of static friction is

3A ball rolls off a table 1.25 m high. How long does it take to reach the floor?

4A projectile is launched at 40 m/s at 30° to the horizontal (g = 10 m/s²). Its horizontal range is about

5For a projectile launched on level ground, the range is greatest at an angle of

6A body moving in a circle at constant speed has an acceleration directed

7A 0.5 kg stone is whirled in a horizontal circle of radius 2 m at 4 m/s. The centripetal force is

8A force of 20 N is needed to slide a box whose weight is 100 N at steady speed. What is the coefficient of friction?

9At the highest point of its path, a projectile's vertical velocity is

10Lubrication reduces