1.in which situation can we say that there is a celeration ?
A. car moving on a straight road
B. a bus moving at 60 m/s
C. a ball moving at a constant speed
D. a bicycle making a smooth turn to the right
2. which of the following object has a greater inertia ?
A. 2 kg ball
B. 5 kg Cart
C. 15 kg bicycle
D. 20 kg cabinet
3.which of the following statements is not true?
A.gravity acts on all object on the earth's surface
B.when object are released to the ground by free fall they accelerate.
C.when objects fall their velocity is increased by 8.9 m/ s every 1 second .
D. two object of different mass will reach the ground at the same time if released from the above at the same height
4.when an object falls to the ground which of the following describe the object potential energy and kinetic energy ?
A.potential decreases while kinetic increases
B.both potential and kinetic and increases
C.potential increases while kinetic decreases
D.potential and kinetic decreases
5.which situation shows work is being done ?
A.carrying a pail of water
B.carrying a baby across a hall
C.holding a barbell overhead
D.lifting a sack of rice ​