53.) The ball has 20kg of mass with potential energy of 5,000 J above the ground. Calculate the height above the ground. a. 25.51m b. 21.51m c. 21.23m d. 51.25m 54.) The sack of rice has 50kg of mass with 2m above the ground when boy left it. Calculate the potential energy. a. 490J b. 890J c. -980J d. 980J 55.) The ball has 7kg of mass with potential energy of 10,000 J above the ground. Calculate the height above the ground. a. 144.77m b. 145.77m c. 143.77m d. 142.77m 56.) The box has potential energy of 10,000 J with 20 m above the ground. Calculate the mass of box. a. 51.02kg b. 52.02kg c. 50.03kg d. 51.03kg 57.) It is possessed by a body is genenally defined as the product of its mass and velocity. a. Power b. Energy c. Potential energy d. momentum 58.) A basketball ball having 2kg mass and 6 m/s velocity moves to the east. Calculate the momentum of the object. a. 13kg m/s b. 14kg m/s c. 12kg m/s d. 15kg m/s 59.) A car having 22,500 kg m/s momentum and 15m/s velocity moves to the north. Calculate the mass of the object. a. 1500kg b. 1600kg c. 1700kg d. 1800kg 60.) A child having mass 25kg and momentum 50kg m/s. calculate the velocity of the object. a. 4m/s b. 2m/s c. 3m/s d. 511/5 61.) A school bus having 30,000 kg mass and 5 m/s velocity moves to the south. Calculate the momentun of the school bus. 0. 150,000kg b. 150,000kg m/s c. 150,000m/s d. 150,000N 62.) A track having 22,500 kg m/s momentum and 10m/s velocity moves to the north. Calculate the mass of the track. a. 2,25ON b. 2,250kg c. 2,250m/s d. 2,250.7 63.) A child having mass 50kg and momentum 350kg m/s. calculate the velocity of the object. a. 7kg b. 7N c. 7m/s d. U 64.) It is the rate of doing work a, momentum b. power a. motion d. potential 65.) The unit of power is. a. Watts b. Joules c. Meters d. Kilogmms 66.) The formula of momentum. a. P=mve b. p=mv c. p=mva d. p=mv4 ; 67.) The formula of power. 1' a. P=W/t'a b. P=W/t c. P=Wt d. P=W/t2 1 68.) The watts unit is from the name of. a. Jones Watt b. John Watt c. Jade Watt d. James 69.) It is a certain amount of force you apply for a certain amount of time to cause a Watt 1 change in momentum. a. Impulse b. Momentum c. Power d. energy 70.) What is the impulse caused by an average force of 10 Newtons if it acts on a ball for 2.0 seconds? a. ZON b. 10s c. ZON: d. 10Ns 71.) What is the time caused by an average force of 50 Newtons with impulse on a ball for 2.0 newton seconds? a. 15m/s b. 25kg c. 0.04s d. 15s 3 Scanned with CamScanner