Answer:
When a ball thrown upward reaches its highest point, its velocity is? is still -9.8 m/s2. The acceleration due to gravity is always -9.8 m/s/s, regardless of the ball's velocity.
I think that friction is the force exerted on an object when it is in contact with another object as it moves or tries to move.
Answer:
The brakes don't grip the tires as securely as the water prevents a stable grip. The car will skid straight along the road as the tires don't have traction along a wet surface
Answer:
T = (27 da * 24 hr/da + 7 hr + 43 min/60 min/hr) * 3600 sec/hr = 2.36 * 10E6 sec period of moon in sec
C = v t = 2 pi R circumference of orbit where v is orbital speed
ac (centripetal acceleration) = v^2 / R = v^2 / (v t / 2 pi) = 2 pi v / t
ac = 2 pi * 1.03 * 10E3 m/s / 2.36 * 10E6 sec = 2.74 * 10E-3 m /s^2
Newtons (force)=Mass * acceleration
147=Mass (in Kilograms) * 9.8m/s^2
147/9.8=15
the mass is 15kg
