Phy Y8Y9 7_2 Speed Velocity Acceleration _01

A body is said to have ​ (a)   under the following conditions: (a) its ​ (b)   is increasing. (b) its velocity is ​ (c)   . (c) its ​ (d)   is changing.

• acceleration
• velocity
• decreasing
• direction

Definition of rest and motion : a) An object is at ​ (a)   if it does not change its ​ (b)   with respect to its surroundings and​ (c)   . b) An object is in ​ (d)   if its ​ (e)   with respect to its surroundings and time.

• rest
• position
• time
• motion
• position changes

the relationship of time period and frequency: the time period of a ​ (a)   is the time taken by the pendulum to complete one ​ (b)   but the ​ (c)   of a simple pendulum is the ​ (d)   of oscillation made by the pendulum in ​ (e)  

• simple pendulum
• oscillation
• frequency
• number
• one second

Speed: 1. It is the ​ (a)   of ​ (b)   . 2. It is a ​ (c)   quantity. 3. The ​ (d)   of a moving body can ​ (e)   .

• rate of change
• distance
• scalar
• speed
• never be equal to zero

Velocity 1. It is the ​ (a)   of ​ (b)   . 2. It is a ​ (c)   quantity. 3. The ​ (d)   of a moving body can ​ (e)   if it goes back to its initial position

• rate of change
• displacement
• vector
• velocity
• become zero

​ (a)   quantities are the ​ (b)   with ​ (c)   only. Examples: ​ (d)   , time, ​ (e)   , volume, distance, speed or work.

• Scalar
• physical quantities
• magnitude
• mass
• density

​ (a)   quantities are the ​ (b)   with ​ (c)   only. Examples: ​ (d)   , time, ​ (e)   , volume, distance, speed or work.

• Scalar
• physical quantities
• magnitude
• mass
• density

​ (a)   quantities are physical ​ (b)   with ​ (c)   and ​ (d)   . Examples are ​ (e)   , velocity, acceleration or force (

• vector
• quantities
• magnitude
• direction
• displacement

​ (a)   quantities are ​ (b)   quantities with ​ (c)   and direction. Examples are displacement, ​ (d)   , ​ (e)   or force

• vector
• physical
• magnitude
• velocity
• acceleration

When a particle is ​ (a)   and its ​ (b)   is ​ (c)   with time, its ​ (d)   is ​ (e)  

• slowing down
• velocity
• decreasing
• acceleration
• negative