Does an object need a force to start moving

Two children are playing on the seesaw, Tommy and Jane. Now, Tommy is bit of a bigger kid and his mass is 50 kg. Jane has a much smaller mass of 30 kg. Tommy is sitting 3 meters away from the center of the seesaw.

How many squares are in 2*2 grid?

Where is the moon in relation to Earth and the sun during phase B?

What is the angular position in radians of the minute hand of a clock at 2:55?

A 5.22-kg object passes through the origin at time t = 0 such that its x component of velocity is 5.10 m/s and its y component of velocity is - 2.82 m/s. (a) what is the kinetic energy of the object at this time?

n open rectangular tank is filled to a depth of 2 m with water (density 1000 kg/m3). On top of the water there is a 1 m deep layer of gasoline (density 700 kg/m3). The width of the tank is 1 m (the direction perpendicular to the paper).

Is the sun considered a star?

If I get a spare in one frame and then roll a 1 and 5 in the next frame, what would my score for the spare be? A 10 B 11 C 16 D17

2x^2:3=dg solve for x

A 2.25-kg block is released from rest on a ramp of height h. when the block is released, it slides without friction to the bottom of the ramp, and then continues across a surface that is frictionless except for a rough patch of width 15.