15.) Solve the unit vectors using the dot productA = -521 - 13/ - 3k, and B = 4( + 2) - k. a. -120 b. 335 C. 1056 d. -231 16.) Solve the unit vectors using the dot productA = 301 + 18/ - 90k, and B = 251 + 2/ - 3k -120 b. 335 c. 1056 d. -231 17.) The vector product of two vectors A andB is denoted byAxB. Because of this notation, the vector product is called a. Cross product b . Dot product c. Scalar product d. Vector product 18.) Solve the unit vectors using the cross productA = 51 + 9/ + 3k, and B = 51 + 3/ +9k. a. 72i - 45/ -45k b. 721 - 15/ - 15k C. 721 - 30/ - 30k d. 721 - 18/ - 18k 19.) What is the result unit vector of J x !? a 1 b. 0 C. k d. 20.) What is the result unit vector of -/ x:? b. 0 C. 21.) It is a vector connecting the initial position P1 and the final position P2 of the body. a. Displacement b. Acceleration c. Average velocity d. Velocity Items no. 22-24. Position of a dragster at two times during its run, first position is 30 m with time7.0s and second position is 230m with time of 20s. 22.) Calculate the displacement from P1 and P2. a 200m b. 320m c. 230m d. 300m 23.) Calculate the time from P1 and P2. a. 3.5s b. 35s c. 13s d. 1.3s 24.) Calculate the average velocity a. 86m/s b. 91.43m/s c. 15.38m/s d. 15.08m/s 25.) Calculate the velocity of a car that covered a distance of 500 meters in 25 seconds. a. 10m/s b. 20m/s c. 50m/s d. 25m/s 26.) A car with a uniform velocity of 25 m/s left MSU Marawi city at 10:00 am and arrived AKIC Senior high at 10:30 am. Calculate its distance. a 18,000m b. 200m c. 320m d. 45,000m 27.) A body rolled from point X to point Y in 5 seconds with a velocity of 25 m/s. Calculate the acceleration of the car. a. 2.5m/s b. 4.17m/s2 C. 5m/s2 d. 125m/$2 28.) It is the rate of change of velocity with time. In kinematics it is represent with (a) with the units of meter per second squared. a. Velocity b. Acceleration c. Distance d. Displacement 29.) A car moves from rest with an acceleration of 2.5m/s' . Find its velocity when it has moved a distance of 65m. a. 4.47m/s b. 18.03m/s C . 91.43m/s d. 10m/s Items no. 30-31. A car is uniformly retarded and brought to rest from a velocity of 30km/h in 2 second. Find: 30.) its retardation a. 2.5m/s2 b. 4.17m/s2 c. 2m/s2 d. 125m/s2 31.) the distance covered during this period. a. 25m b. 8.34m c. 320m d. 200m 32.) A car is uniformly retarded and brought to rest with acceleration of 25 m/s2 in 5 second. Find Final velocity. a. 125m/s b. 2.5m/s2 c. 4.17m/s2 d. 2m/s2 Items no. 33-34. A peso coin is dropped from the Leaning Tower of Pisa. It starts from rest and falls freely. 33.) Compute its position after 8.0s. -1.23m b . 627.2m C. -627.2m d. -313.6 m CS Scanned with CamScanner