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Which of Newton's Laws explains someone needing to wear a seatbelt in a car?
1st Law
Which of Newton's Laws explains the motion of a swimmer paddling their arms one way but moving through the water in the other direction?
3rd Law
To find the net force of two objects moving in the opposite direction, you would ______ the two forces.
subtract
55 m/s is an example of ________.
speed
5 m/s west is an example of ______.
velocity
Force is measured in __________. (units)
Newtons
Acceleration is measured in _______. (units)
distance/time^2
A runner travels 15 km in two hours. What is his speed?
7.5 km/hr
A student pushes a cart with a 25 kg mass. How much force does she use if the cart accelerates at 2.5 m/s/s?
62.5 N
A change in distance over a specific amount of time is the ___________.
speed
A change in distance over a specific amount of time plus the direction is the ___________.
velocity
A change in velocity over a specific amount of time is the ___________.
acceleration
A runner moves at 3 m/s. This is his _______.
speed
A walker walks home from school at 1.5 m/s west. This is her ________.
velocity
A 2000 N force acts on a 40kg object. What is the acceleration?
50 m/s/s
A book sitting on a shelf is an example of which of Newton's Laws?
1st Law
